acute myocardial infarction

The objectives of the present study were to assess the association between dietary patterns and acute myocardial infarction (AMI) globally.

Why Percutaneous Coronary Intervention Can't Improve the Long-term Outcome of Medicare Patients with Acute Myocardial Infarction in USA?

To Explore the value of the collateral circulation for the long-term prognosis in acute myocardial infarction.

We report a case of emergency stenting for acute occlusion of the left main coronary artery in the setting of acute myocardial infarction.

Is Ramipril Really Better Than Other Angiotensin-Converting Enzyme Inhibitors After Acute Myocardial Infarction? Gunraj N. Mamdani M.

MATERIALS: Big- eared Japanese rabbits were used to create models of acute myocardial infarction.

In emergency clinic the ECG findings was compatible with acute myocardial infarction and was admit to CCU for treatment.

To investigate the incidence of hypokalemia and its effects on prognosis in patients with acute myocardial infarction(AMI).

Conclusion Improvement of identify capability for painless acute myocardial infarction can reduce complications and mortality.

Objective: Effectiveness of coronary artery thrombolysis and emergency stenting in patients with acute myocardial infarction (AMI).

Objective: To investigate the influence of vein thrombolysis for acute myocardial infarction (AMI) on the early left ventricle rostoration.

Objective To explore the clinical characteristics of chronic pulmonary heart disease combined with acute myocardial infarction(AMI).

Objective To evaluate the value of echocardiography in the diagnosis of acute myocardial infarction and its complications.

Objective To summarize and analyze the postoperative nursing for acute myocardial infarction complicated with cardiac rupture.

Objective: To observe the efficacy of intravenous thrombolytic therapy of streptokinase on early acute myocardial infarction (AMI).

With the increase in the morbidity of acute myocardial infarction, new thrombolytics are continually developed.

Objective To compare the clinical feature and revascularization status in the aged with different types of acute myocardial infarction.

abstract: Objective To evaluate the right ventricular acute myocardial infarction diagnosis and treatment of disease.

Primary angioplasty results in higher reperfusion rates than fibrinolysis in patients with acute myocardial infarction (MI).

abstract: Objective To evaluate the cardiac rehabilitation program in patients with acute myocardial infarction in the clinical effect.

Objective: To evaluate the clinical efficacy of intravenous thrombolytic therapy on acute myocardial infarction (AMI).

Objective To investigate the effects of transplantation of MSCs on energy metabolism enzymes after acute myocardial infarction.

Objective To report the clinical effect of primary percutaneous coronary intervention(PCI)in patients with acute myocardial infarction(AMI).

Ventricular remodeling after acute myocardial infarction : effect of low- intensity laser irradiation .

abstract: Objective To investigate the clinical value of myoglobin and troponin testing for early diagnosis of acute myocardial infarction.

Objective To investigate the clinical features and treatment of acute myocardial infarction with diabetes mellitus.

Objective: This study examines which health system factors are associated with outcome of care for acute myocardial infarction (AMI).

Transient left ventricular apical ballooning syndrome is a rare cause of acute chest pain mimicking acute myocardial infarction.

Objective: To explore the clinical character of acute myocardial infarction (AMT) complicated with acute left heart failure.

To establish acute myocardial infarction (AMI) model in dogs and observe the changes of post-infarction ventricular remodeling.

Objective: To observe the reduction of QT dispersion(QTd) in patients with acute myocardial infarction(AMI) treated with urokinase.

Objective: To explore the intervention effect of early cardiac rehabilitation in treatment of acute myocardial infarction(AMI).

Objective To explore the treatment effect of rehabilitation procedures in patients with acute myocardial infarction .

The optimal strategy of acute myocardial infarction and shock is addressed, as is the role of angioplasty in multi vessel coronary disease.

Over the past 10 years, China 's acute myocardial infarction incidence rate has been close to the international average level.

Objective: To comprehend the postoperative care of the patients who got acute myocardial infarction and completed interventional therapy.

Acute myocardial infarction (amI) secondary to acute ascending aortic dissection is a rare condition.

Acute myocardial infarction with preceding infection has been reported before but the exact mechanism is not clear.

Clinical Assessment of Long Term Benefits of Reperfusion Therapies in Acute Myocardial Infarction.

This article reviews the effects and possible mechanisms of NO on arrhythmia after acute myocardial infarction(AMI).

The earliest change histologically seen with acute myocardial infarction in the first day is contraction band necrosis.

Intravascular laser therapy of acute myocardial infarction .

Objective: To evaluate the impact of age and sex on in-hospital outcomes of patients with acute myocardial infarction.

Objective: To investigate the effects of Shenmai injection on ventricular remodeling after acute myocardial infarction(AMI) in rats.

Conclusion Tirofiban to emergency intervention therapy in paitent with acute myocardial infarction is effective and safe.

Method: 81 cases of patients with acute myocardial infarction targeted health education and psychological care to observe the effects.

Objective To discuss the effect and experience in treating acute myocardial infarction by PTCA and stent implantation.

Objective To investigate the effect of nursing intervention on the treatment of patients with acute myocardial infarction.

Acute myocardial infarction and CTO were independent risk factors for long-term prognosis.

intraaortic balloon pump(IABP); acute myocardial infarction; cardiogenic shock.

Objective: To investigate the path of emergency care in acute myocardial infarction.

The GEI value of acute myocardial infarction in men and hypertensive heart disease in women presented a decline tendency.

Deliver Reliable, Evidence-Based Care for Acute Myocardial Infarction. . . to prevent deaths from heart attack.

Objective To analyze retrospectively the clinical feature of acute myocardial infarction(AMI) with pump exhaust ion in 45 cases.

Objective To discuss the influence of dissolved cork treatment for again angina pectoris in the acute myocardial infarction.

Objootive Establish a sound painless acute myocardial infarction in patients with clinical nursing path.

AIM: To survey the use of thrombolytic therapy (TT) for first acute myocardial infarction (AMI) in recent years.

I examine the effect of ownership choice on patient outcomes after the treatment for acute myocardial infarction.

Methods 20 patients with painless acute myocardial infarction were observed and treated.

ST segment elevation in acute myocardial infarction is common, but it can be seen in other conditions.

Methords: 50 patients with acute myocardial infarction(AMI) were divided randomly to either urokinase group or control group.

Conclusion Emegency PCI remains an effective way to treat patients with cardiogenic shock followed by acute myocardial infarction.

Thrombus aspiration in all acute myocardial infarction patients or based on thrombus assessment?

We will review here the use of direct, immediate, rescue and deferred or elective angioplasty in acute myocardial infarction.

Objective To analyze clinical features and etiology of 56 youth acute myocardial infarction patients in our hospital.

Objective To observe the protective effects of XinTongTie (XTT) on acute myocardial infarction in dogs.

Objective To observe the protective mechanism of Xintong Tie (XTT )on acute myocardial infarction(AMI) in dogs.

What is the response to acute myocardial infarction, a heart attack, today?

Recently many studies have revealed that vascular inflammation plays an important role in the development of acute myocardial infarction.

Acute myocardial infarction accounted for a comparable number of readmissions (4. 2 to 6. 0% of patients annually).

A 0. 36 SD improvement in management quality is associated with 47 fewer deaths from acute myocardial infarction per hospital per year.

Methods: 128 patients with CAD included 52 cases with unstable angina(UA) and 76 patients with acute myocardial infarction(AMI).

The following report is on the early rehabilitation treatment of 35 cases with acute myocardial infarction, 31 males and 4 females.

That night, the elderly because of acute myocardial infarction depart from the world for ever, she walked in a hurry, go not acceptable.

Objective To study the expression of the glycoprotein in atrioventricular cell membrane of the acute myocardial infarction.

Objective To study the humanistic concern for the influence of patients with acute myocardial infarction rehabilitation.

Objective: To study the correlation between atrial fibrillation(AF) in acute myocardial infarction (AMI) and coronary artery lesions.

Objective To study the necessity and safety of prehospital thrombolytic treatment in patients with acute myocardial infarction(AMI).

Objective: To study the coronary angiographic characteristics of acute myocardial infarction (AMI) patients with prior angina pectoris.

Objective: To study the frequency and therapeutic effect of anxious disorder in patients with acute myocardial infarction.

Clinical manifestation and prognosis of the children with acute myocardial infarction-like acute severe myocarditis

Pre-hospital delay state to see doctor of acute myocardial infarction patients and its influencing factors

Probe into causes of delay to see doctors for acute myocardial infarction patients with qualitative research

The Experiment Study of the Traditional Chinese Herbal Compound Reverse Myocardial Fibrosis after Acute Myocardial Infarction

Clinical study of the influence of infarct zone myocardial viability on left ventricular remodeling after acute myocardial infarction

A study of the ST-segment resolution of acute myocardial infarction patients treated with emergent percutaneous coronary intervention

Causative analyses on acute myocardial infarction patients delayed to see doctor

The Comparative Study of Thrombolysis Treatment for Acute Myocardial Infarction with Recombinant Streptokinase Before and After Admission

Present and prospect on research of thrombolytic agents used for acute myocardial infarction

Clinical study of the effects of bone marrow stem cell mobilization on left ventricular remodeling after acute myocardial infarction

The Clinical Study of before Thrombolytics Administration Potassium-magnesium Aspartate in Acute Myocardial Infarction

Primary study of emergency interventional technique in patients with acute myocardial infarction complicated by cardiogenic shock

Depressive state of hospitalized patients suffering acute myocardial infarction and significance of antidepressant therapy

Study of facilitated percutaneous coronary intervention on the myocardial perfusion in patients with acute myocardial infarction

The characteristic study of echocardiography and coronary angiography in diabetic patients with acute myocardial infarction

The best blood pressures at the beginning of thrombolytic therapy on acute myocardial infarction: report of 57 cases

Reperfusion arrhythmias in acute myocardial infarction do not enhance myocardial injury

Clinical Behavior and Follow - up Result of Acute Myocardial Infarction Companion Depression

The clinical study of subacute thrombosis in coronary stents after percutaneous coronary intervention of acute myocardial infarction

Effect of rehabilitation education on the quality of life of the patients in the convalescence stage of the acute myocardial infarction

Clinical investigations of carvedilol treatment on patients with acute myocardial infarction and its function of antioxygen free radical

Experimental study of the treatment of acute myocardial infarction in rats with the mobilization of bone marrow stem cells

Progress Study of No-reflow Phenomenon After Percutaneous Coronary Intervention in Patients with Acute Myocardial Infarction

Effects of combination of spironolactone and losartan on myocardial healing during the early stage of acute myocardial infarction in rats

Study of Relationships between Extrinsic Route of Blood Coagulation with Endothelial Cell Injury and Acute Myocardial Infarction

Contrast Study of Acute Myocardial Infarction's High Frequency Electrocardiogram and Ventricle Late Electric Potential

A Comparative Study of Life Events, life Style, Negative Emotion Between Acute Myocardial Infarction Patients and Normal Persons

Study on the heart rate turbulence in ageing patients with acute myocardial infarction

The relationship between the left ventricular remodeling and ventricular arrhythmias after acute myocardial infarction

A Comparison Study of Losartan and Captopril on the Left Ventricular Systolic Synchrony Following Acute Myocardial Infarction

The clinical study of accelerated percutaneous coronary intervention in acute myocardial infarction

An Investigation of the Difference of Risk Factors of Acute Myocardial Infarction Between the Young Patients and the Old Patients

Clinical significance of the tombstoning electrocardiographic pattern of ST-segment change in acute myocardial infarction

Reperfusion of Microcirculation After Thrombolysis in Acute Myocardial Infarction and Its Clinical Implication

Establishment of a Standard Acute Myocardial Infarction Model for Cellular Transplantation Research in Rats

Clinical Study of the Relationship between Hypoxemia and Acute Myocardial Infarction

Significance of Neutrophil Counts after Reperfusion Therapy in Patients With an Anterior Wall Acute Myocardial Infarction

Experimental study of improving survival rate of acute myocardial infarction rat model

Comparative Study of New Myocardial Injury Marker in Early Diagnosis of Acute Myocardial Infarction

Experience of Gradation Theory of Needs Used to Nursing Diagnosis of Acute Myocardial Infarction

Experimental study of Radix Astragali on left ventricular remodeling after acute myocardial infarction

Experimental study of effect of carvedilol on myocardial collagen network remodeling after acute myocardial infarction in rats

Clinical significance of the early T-wave inversion after thrombolytic therapy in acute myocardial infarction

The relationship between QT dispersion and severe ventricular arrhythmia at the early stage of acute myocardial infarction

Clinical Evaluation of a Five Grade Early Mobilization Protocal in Patients soon after Acute Myocardial Infarction

Comparison of the Clinical Efficacy of Direct Percutaneous Coronary Intervention with Thrombolytic Therapy in Acute Myocardial Infarction

The day and light rhythm for the time of pain occurrence among patients with acute myocardial infarction

Study of the Treatment on Acute Myocardial Infarction by Recombinant Streptokinase

Intravenous thrombolysis therapies in acute myocardial infarction with the reconstructive tissue plasminogen activator in prehospital care

Study of Prognosis of Acute Myocardial Infarction After Transplanting Autologous Mononuclear Bone Marrow Cell Through Intracoronary Route

The Mechanism of Acute Myocardial Infarction Complicated with Cerebral Infarction and Its Proper Prophylactic Methods

Echocardiography derived variables predicting left ventricular remodeling after acute myocardial infarction

Predictive factors and clinical significance of spontaneous recanalization of the infarct related artery in acute myocardial infarction

Correlation between physiological characteristics and clinical manifestation in patients with acute myocardial infarction

An experimental study of recombinant human erythropoietin on the treatment of acute myocardial infarction in rats

Comparison of the clinical efficacy of emergent percutaneous coronary angioplasty and thrombolysis in acute myocardial infarction

Clinical Thrombolytic Trial of A New Type of Tissue-Plasminogen Activator in Patients with Acute Myocardial Infarction

Effect of percutaneous coronary intervention on QT dispersion and its clinical implication in patients with acute myocardial infarction

Relationship Between the Severity and Prognosis of Coronary Artery Disease, and Serum Potassium in Acute Myocardial Infarction

Clinical Study of Combine of Clopidogrel and Aspirin Therapy in Patients of Acute Myocardial Infarction with ST-Elevation

Prognostic significance of atrial fibrillation in patients with acute myocardial infarction treated with percutaneous coronary intervention

Role of Stress Hyperglycaemia in Ventricular Remodeling in Patients with Acute Myocardial Infarction and Its Prognostic Value

Exploratory research on heart type fatty acid-binding protein for the early diagnosis of acute myocardial infarction

Clinical nursing significance of electrocardiographic monitor in primary interventional therapy of acute myocardial infarction

Electrocardiographic characteristics in patients with acute myocardial infarction associated with left main artery obstruction

An experimental study of recombinant human erythropoietin in the treatment of acute myocardial infarction in rats

Early rehabilitation exercise of inpatient associated with outpatient rehabilitation exercise in patients with acute myocardial infarction

Sequence analysis of electrocardiogram characteristics and coronary angiography in patients with inferior wall acute myocardial infarction

Study on the heart rate turbulence in acute myocardial infarction

Beneficial Effects of Ischemic Preconditioning on Myocardial No-reflow in a Mini-swine Model of Acute Myocardial Infarction and Reperfusion

Rapid Quantitative Analysis of Myohemoglobin and Cardiac Troponin I for Early Diagnos is of Acute Myocardial Infarction

Analysis of the effects of two different reperfusion therapies for acute myocardial infarction

The clinic study of thrombolytic therapy using urokinase in aged patients with acute myocardial infarction

Clinical study of ischemic preconditioning and acute myocardial infarction

Plaque morphological characteristics of acute myocardial infarction observed by intravascular ultrasound

Evaluation of Myocardial Perfusion Improvement After Coronary Revascularization in Patients With Acute Myocardial Infarction

Usefulness of Color Doppler Echocardiography in the Diagnosis of Acute Myocardial Infarction and Its Complications

Relative factors for angiographic no-reflow phenomenon after primary percutaneous coronary intervention with acute myocardial infarction

Application of distal protective device during emergent percutaneous coronary intervention in acute myocardial infarction patients

Analysis of factors associated with delay time of treatment in patients with acute myocardial infarction

A contrast study of clinical effects of intravenous thrombolysis therapy for men and women with acute myocardial infarction

The significance of heart rate turbulence as a predictor of subsequent heart incident after acute myocardial infarction in old patients

Clinical Study of Pulse Pressure in Acute Myocardial Infarction Patients with Hypertension

Causes of death of acute myocardial infarction patients who underwent primary percutaneous coronary intervention during hospitalization

Myocardial protection of L-carnitine in patients with acute myocardial infarction undergoing primary percutaneous coronary intervention

Discussion of clinical and angiographic characteristics of the young patients with acute myocardial infarction

Clinical study of protective effect of intravenous morphine on the patients with acute myocardial infarction

Study of activated T-lymphocyte subsets of peripheral blood in patients with acute myocardial infarction

Emergency Percutaneous Coronary Intervention for Patients with Acute Myocardial Infarction: a Preliminary Experience

Electrocardiographic Significance of Deciding Artery-related Infarction in Patients With Acute Myocardial Infarction

The Clinical Significance of Myocardial Ischemia Premodulation during the Acute Myocardial Infarction

Comparison the Clinical Efficacy of Direct Percutaneous Coronary Intervention with Thrombolytic Therapy in Acute Myocardial Infarction

Analysis of the change of blood pressure and clinical features in patients with acute myocardial infarction complicating hypertension

A Comparative Study of Negative Emotion Between Acute Myocardial Infarction and Normal Persons

Detection of the Viability of Myocardium in Early Acute Myocardial Infarction Using Low- dose Dobutamine Stress Echocardiography

Randomized, double-blind study comparing saruplase with streptokinase therapy in acute myocardial infarction: the COMPASS equivalence trial

Clinical research on recanalization and revascularization following acute myocardial infarction

Relation between cytomegalovirus infection and acute myocardial infarction and inflammation substances

Fulminant myocarditis cases with electrocardiogram manifestation more like acute myocardial infarction

Relationship between plasma brain natriuretic peptide concentration and clinical prognosis in patients of acute myocardial infarction

Influence of allogeneic bone marrow mononuclear cells transplantation on rat ventricular remodeling after acute myocardial infarction

Clinical study of acute myocardial infarction with normal coronary artery at acute phase angiogram

Discussion of the Risk Factors and Angiographic Characteristics of the Young Patients with Acute Myocardial Infarction

Relationship between stress hyperglycemia concentration and clinical prognosis in patients of acute myocardial infarction

Usefulness of Myocardial Contrast Echocardiography in Predicting Late Mortality in Patients With Anterior Wall Acute Myocardial Infarction

The Value of Baroreflex Sensitivity to Predict the Early Death Rate of Acute Myocardial Infarction Patients

Changes of the plasma thrombin-antithrombin complex level after thrombolytic treatment of acute myocardial infarction

Study of emergency direct coronary stenting in patients with acute myocardial infarction

The early mentality rehabilitation nursing of acute myocardial infarction patients

Clinical features and prognosis of the initial non-corresponding ST-segment depression in patients with acute myocardial infarction

Intravenous Amiodarone for atrial Fibrillation Complicating Acute Myocardial Infarction

Comparison of Thrombolysis and Non-thrombolysis during Cardiopulmonary Resuscitation in Acute Myocardial Infarction: a Meta-analysis

Correlations between the prognosis and fibrinogen and serum uric acid in patients with acute myocardial infarction

Lesion characteristics of acute myocardial infarction: an investigation with intravascular ultrasound

Intravenous thrombolysis with recombinant staphylokinase in patients with acute myocardial infarction

Association between Arrhythmias and Clinical Characteristics after Acute Myocardial Infarction

A five years follow-up study of early and long-term treatment of captopril in patients with acute myocardial infarction

Clinical implication of the change of heart rate variability in acute myocardial infarction patients with thrombolytic therapy

Clinical application of tirofiban in patients with acute myocardial infarction underwent percutaneous intervention

Correlation between severe ventricular arrhythmia occurring in acute myocardial infarction early stage and low serum kalium concentration

Strategy of percutaneous acute coronary intervention in patients with acute myocardial infarction and haemodynamic instability

Comparison of thrombolytic therapy with recombinant tissue plasminogen activator and urokinase for acute myocardial infarction

Emergency interventional technique in elderly patients with acute myocardial infarction complicated by cardiogenic shock

The Significance of Reactive Hyperglycemia in Early Phase of Acute Myocardial Infarction and Its Prognostic Value

Clinical Study of Acute Myocardial Infarction by Dissolving Thrombi with Urokinase

Dynamic Changes and Its Significance of Inflammatory Mediators in Acute Myocardial Infarction

Beneficial effects of nicorandil on myocardial no-reflow state in a mini-swine model of acute myocardial infarction and reperfusion

Ventricular arrhythmias among patients of acute myocardial infarction with no ST-segment elevation incidence, high risk factor and outcomes

Early Clinical Application of Exercise Testing Soon After Percutaneous Coronary Intervention of Patient with Acute Myocardial Infarction

Clinical characteristics and prognostic significance of complete right bundle-branch block in early acute myocardial infarction patients

Comparing the efficacy of emergent percutaneous coronary intervention and thrombolytic therapy in acute myocardial infarction

Application of distal balloon protection device in primary percutaneous coronary intervention for acute myocardial infarction

Insufficiency in admission evaluation of patients with metabolic syndrome and acute myocardial infarction and countermeasures

Influence of the Various Dose of Atorvastatin on Insulin Resistance in Patients with Acute Myocardial Infarction

Coronary angiography and clinical characteristics of ventricular septal rupture after acute myocardial infarction

Autologous bone-marrow mononuclear cells transplantation in experimental acute myocardial infarction

Analysis of the clinical characters and prognosis of diabetes mellitus complicated with acute myocardial infarction

Effects of delayed percutaneous coronary interventions on left ventricular remodeling after acute myocardial infarction

Relationship between clinical features and early electrocardiogram changes in patients with acute myocardial infarction

Study of rehabilitation therapy in patients with acute myocardial infarction

Influence of starting time of venous thrombolysis on thrombloytic efficacy in patients with acute myocardial infarction

Study of angiogenesis in ischemic myocardium after acute myocardial infarction in dogs

Effect of early statin treatment following acute myocardial infarction on mortality and its correlation with lipid level

Thrombus aspiration during percutaneous coronary intervention in patients with acute myocardial infarction

Relationship between myocardial reperfusion flow in patients after acute myocardial infarction and brain natriuretic peptide

Delayed percutaneous coronary intervention treated acute myocardial infarction

Application of intra - vascular ultrasonic examination after thrombolytic therapy of acute myocardial infarction

Strategy for Treatment of Acute Myocardial Infarction after Coronary Revascularization with Integrative Medicine

Nursing countermeasure and analysis of complications about acute myocardial infarction with thrombolytic therapy

Relationship between Monophasic Action Potentials and Ischemic Arrhythmias in Acute Myocardial Infarction Canine

Clinical benefits of immediate percutaneous coronary intervention therapy in patients with acute myocardial infarction

Relationship between Electrocardiogram and Infarction Related Artery of Acute Myocardial Infarction

Beneficial effects of fosinopril on myocardial no-reflow in a mini-swine model of acute myocardial infarction and reperfusion

Analysis of transvenous temporary cardiac pacing with bedside insertion of balloon-tipped floating catheters in acute myocardial infarction

Analyses of the change of QT dispersion in patients with acute myocardial infarction after intravenous thrombolytic therapy

Clinical significance and changes of myocardial perfusion and myocardial metabolism after PTCA in patients with acute myocardial infarction

Effects of reperfusion arrhythmia on myocardial apoptosis and left ventricular remodeling in patients with acute myocardial infarction

Dexamethasone Alleviates the No-reflow Phenomenon after Restoration of Coronary Blood Flow in Experimental Acute Myocardial Infarction

Comparison of the effects of early and long-term captopril treatment on the elderly and younger patients after acute myocardial infarction

Prognostic Value of Doppler Echocardiography in Acute Myocardial infarction Patients with Interventricular Septal Rupture

Emergency percutaneous coronary interventional therapy in acute myocardial infarction

Investigation on the relationship between acute myocardial infarction pump exhaustion and preconditioning

Effect of early rehabilitation treatment on quality of life in patients with acute myocardial infarction

Clinical Study Of Heart Rate Variability in Patients With Acute Myocardial Infarction

Application of tirofiban in peri-primary percutaneous coronary intervention period for acute myocardial infarction patients

Application of potassium magnesium aspartate in aged patients of acute myocardial infarction without thrombolytic treatment

Evaluation of clinical criteria of coronary artery recanalization after thrombolytic therapy in acute myocardial infarction

Effect of clinical prognosis of emergent immediate percutaneous coronary intervention therapy in patients with acute myocardial infarction

Beneficial effects of diltiazem on myocardial no-reflow in a mini-swine model of acute myocardial infarction and reperfusion

Beneficial effects of adenosine on myocardial no-reflow in a mini-swine model of acute myocardial infarction and reperfusion