paroxysmal

My mother is abrupt before a week deaf, going to a hospital to examine a possibility is paroxysmal deaf. Hope everybody helps!

If orthopnea causes awakening during the night and is relieved by sitting, it is called paroxysmal nocturnal dyspnea.

Conclusion The AEEG might be of important significance in diagnosis and differential diagnosis in children with paroxysmal diseases.

Postoperative uterine to will the rest of the embryonic organization eduction castle, and paroxysmal shrinkage occurred.

A clinical study of patients with and without recurrence of paroxysmal atrial fibrillation after pulmonary vein isolation .

Conclusion: The therapeutic effect of sotalol in the treatment of paroxysmal atrial fibrillation is better than propafenone.

A case of paroxysmal atrial fibrillation with a vagal origin is presented.

The Long-Term Effect of DDD Pacing on Prevention of Paroxysmal Atrial Fibrillation in Patients With Sick Sinus Syndrome.

It was assumed that the paroxysmal pain might be caused by nerve compression related to temporalis muscle hyperactivity.

Objective: To draw the nursing experience of the patients with paroxysmal atrial fibrillation treated by radiofrequency ablation therapy.

Objective: To investigate the cause of recurrence and clinical significance in benign paroxysmal positional vertigo(BPPV).

The main clinical manifestations were paroxysmal wheezy cough and wheezes during expiratory phase of breathing, accompanied by liver damage!

But the difference of LAD between the paroxysmal atrial fibrillation group and the control group was not statistically significant.

Conclusion: Rosuvastatin can effective treatment the elderly people which has coronary heart disease with paroxysmal atrial fibrillation.

The classic paroxysmal cough of pertussis consists of several rapid, harsh expirations followed by a dramatic inspiratory whoop.

C- Reactive protein elevation predicts the occurrence of atrial structural remodeling in patients with paroxysmal atrial fibrillation .

AVRT characterized by paroxysmal occurrence that slow atrioventricular accessory pathway participates in .

The twitching degree differ, paroxysmal, fast, and not for the law of the seizure.

Objective To compare the effects of propafenone and verapamil in stopping paroxysmal supraventricular tachycardia(PSVT).

Objective: To summarize the experience of treatment of paroxysmal supraventricular tachycardia (PSVT) in pregnant woman.

Objective: To evaluate the efficacy and safety of antiarrhythmics for prevention of recurrence of paroxysmal atrial fibrillation(PAF).

Results The clinical features of the patient included acute onset, paroxysmal dizziness, nausea and vomiting.

Objective: To improve the safety of propafenone in treatment of paroxysmal supraventricular tachycardia (PSVT) .

Objective To explore the relation between clinical and epileptiform discharges of in children with paroxysmal diseases.

Finally, the resource should be carved up by the common resource and paroxysmal-based resource.

Should We Abandon the Common Practice of Withholding Oral Anticoagulation in Paroxysmal Atrial Fibrillation?

To approach the clinical effect and frequency-dependent effects of intravenous Propaenone in paroxysmal supraventricular tachycardia(PSVT).

ABSTRACT: Objective To explore the etiological factors of benign paroxysmal positional vertigo (BPPV).

Reentrant tachycardia in pulmonary veins of patients with paroxysmal atrial fibrillation .

Objective: Investigate clinical value of transesophageal atrial pacing studying paroxysmal atrial fibrillation.

the onset of the disorder is accompanied by paroxysmal abnormalities on the EEG, and in the majority of cases also by epileptic seizures.

Different states of vigilance and various paroxysmal disorders that occur during slow-wave sleep can have the same neural bases.

LI Jin-hong Topic Catheter ablation of atrial fibrillation: Does the era of surpassing paroxysmal atrial fibrillation come?

Patients with paroxysmal or persistent may appear inexplicable fear, tension, anxiety, fear, anxiety and other psychological.

l The crisis management policy is absent. The crisis event is paroxysmal, urgent, limited information and instable.

Paroxysmal AF was mainly managed with strategy of rhythm control and chronic AF, dominant ly with approach of rate control.

Objective To assess the clinical therapeutic effect of sotalol on atrial paroxysmal fibrillation.

Benign paroxysmal positional vertigo (BPPV) is the most frequent vestibular disorder.

The relationship beewet of features of arrhythmia in dynamic electrocardiogram and the paroxysmal atrial fibrillation were observed.

Characterized by paroxysmal vertigo, the volatility of deafness and tinnitus.

Face paroxysmal disaster, the network becomes the platform that releases Everyman mood.

Objective: To observe the efficacy of sotalol in the treatment of paroxysmal atrial fibrillation.

Work close with material and manufacture departments to fix paroxysmal problems .

Catheter ablation plays an important role in the treatment of paroxysmal atrial fibrillation.

Coreference is a common phenomenon in the news report about paroxysmal event, it appears a lot in the discourses or the dialogues.

Objective: To explore the effect of combined therapy of amiodarone and valsartan on paroxysmal atrial fibrillation.

Objective To observe the curative of hyperbaric oxygen plus drug on paroxysmal deafness.

Polypnea , dyadic breath of abdomen , paroxysmal tussis.

the attacks are paroxysmal often occurring during the night .

Is posttraumatic benign paroxysmal positional vertigo different from the idiopathic form?

It is a great calamity for people and properties of paroxysmal water pollution.

ObjectiveTo compare the effect of amiodarone and propafenone on the cardioversion of paroxysmal auricular fibrillation (PAF).

The paroxysmal gasp characteristic of whooping cough .

Paroxysmal extraction should pay attention has the oviduct cancer's possibility.

Results: The incidence of paroxysmal, persistent and perpetual atrial fibrillation patients were 12%, 22%, 66% respectively.

A 78-year-old woman presented with marked dyspnea, orthopnea, and paroxysmal nocturnal dyspnea.

Why to meet paroxysmal bosom is frowsty, is breath hurried?

To make the paroxysmal gasp characteristic of whooping cough.

Objective: To analyze the ECG deviations according to 24hour Holter monitoring of patients with paroxysmal chest pain.

In all arrhythmia cases, the paroxysmal supraventricular tachycardia is most common (43. 0%).

Results: 19 cases (76% ) appeared abnormal EEG. It show sharp paroxysmal activity.

Asthma is a kind of disease characterised by paroxysmal stridor with sputum.

How to improve the ability of handling paroxysmal disaster?

Methods The 24-hour AEEG was monitored in the 134 children with paroxysmal diseases.

Experience a 4-day episode of dry paroxysmal cough.

Overall, they identified 258 paroxysmal AF episodes in 12, 390 consecutive recordings.

As a kind of paroxysmal disaster, the occurrence of flo(omitted)edictable, and the lasting time is short with heavy loss.

Objective: To study the influence of mental intervention on cardioversion of paroxysmal atrial fibrillation (PAF).

Objective: To study the clinical effect of hyperbaric oxygen(HBO) therapy combined with medicine on paroxysmal deafness.

Objective: To study the effect of T-lymphocytes on hematopoietic progenitors in patients with paroxysmal nocturnal hemoglobinuria(PNH).

Objective To study the relation between P wave dispersion, P wave width and paroxysmal atrial fibrillation.

Preliminary study of electrophysiological mechanism and radiofrequency catheter ablation of paroxysmal atrial fibrillation

Comparison of the drugs used for cardioversion of paroxysmal supra -ventricular tachycardia in children: 40 cases

Preliminary study of DA or HA regimen chemotherapy for the treatment of refractory and relapsed paroxysmal nocturnal hemoglobinuria

A study of the effective dosage of intravenous ATP terminating paroxysmal supraventricular tachycardia

The initial study of the mechanism of paroxysmal atrial fibrillation using noncontact mapping technique in the intact human heart

Quality of life in patients with paroxysmal atrial fibrillation after pulmonary vein isolation by radiofrequency catheter ablation

Study of predictive parameters for the onset of paroxysmal atrial fibrillation in old patients with coronary artery disease

Paroxysmal supraventricular tachycardia associated with premature ventricular contractions from right ventricular outflow tract

One case of pulmonary distomiasis with paroxysmal abdominal pain as the main symptom

Clinical study of drugs interference in children with paroxysmal supraventricular tachycardia

Clinical study of ultrasound ablation at pulmonary veins orifice in treatment to patients with paroxysmal atrial fibrillation

The methodological study of segmental isolation of pulmonary veins in patients with paroxysmal atrial fibrillation

Transesophageal electrophysiological differentiation and management of paroxysmal supraventricular tachycardia in children

Analysis of factors associated with recurrence of paroxysmal supraventricular tachycardia after radiofrequency catheter ablation treatment

Comparison between Intravenous Amiodarone or Propafenone in Treating Paroxysmal Supraventricular Tachycardia

Characteristics of electrophysiological connection between atria and myocardial sleeves in patients with paroxysmal atrial fibrillation

The experience radiofrequency catheter ablation treatment of paroxysmal supraventricular tachycardia

Electrocardiographic Markers of Predicting Idiopathic Paroxysmal Atrial Fibrillation

Comparison between Intravenous Verapamil or Propafenone in Treating Paroxysmal Supraventricular Tachycardia

The evaluation of paroxysmal supraventricular tachycardia diagnosed by esophageal electrophysiology

Trans-catheter ablation for the treatment of paroxysmal atrial fibrillation in patients with hypertrophic obstructive cardiomyopathy

Evaluation of the accuracy of transesophageal atrial pacing electrophysiologic in diagnosing paroxysmal supraventricular tachycardia

Clinical study of salbutamol combined with magnesium sulfate by nebulization in the treatment of paroxysmal asthma

Therapeutic Results of Valsartan and Spironolactone on Patients with Essential Hypertension Complicated with Paroxysmal Atrial Fibrillation

Efficacy and Safety of Amiodarone for Paroxysmal Atrial Fibrillation and the Determinants of It's Effect

A randomized placebo-controlled study of moricizine in the prophylaxis of paroxysmal atrial fibrillation

Radiofrequency ablation mapping with circumferential catheter for paroxysmal atrial fibrillation originating from the pulmonary veins

Treatment of paroxysmal supraventricular tachycardia with radiofrequency catheter ablation

Clinical Investigation on Spontaneous Electrical Activity of the Cardiac Veins in Patients With Paroxysmal Atrial Fibrillation

Clinical Investigation on Spontaneous Electrical Activity of the Cardiac Veins in Patients With Paroxysmal Atrial Fibrillation

Some rare electrophysiological phenomena in patients with paroxysmal supraventricular tachycardia

Effect treated paroxysmal supraventricular tachycardia by propafenone intravenous therapy

Observation on propafenone hydrochloride to treat patients with paroxysmal supraventricular tachycardia

Electrophysiological characteristics of pulmonary vein antrum in patients with paroxysmal atrial fibrillation

Radiofrequency catheter ablation of paroxysmal supraventricular tachycardia in elderly patients

Therapeutic Effects of Radiofrequency ablated Pulmonary Vein Electrical Isolation with Cold Brine Tube for Paroxysmal Atrial Fibrillation

Clinical evaluation of circumferential ultrasound ablation of pulmonary veins for patients with paroxysmal atrial fibrillation

Clinical study of horizontal canal benign paroxysmal positional vertigo

Clinical analysis to the serum electrolyte changes of paroxysmal stage of the senile patients with chronic pulmonary heart disease

Clinical analysis to the serum electrolyte changes of paroxysmal stage of the senile patients with chronic pulmonary heart disease

Radiofrequency catheter ablation for the treatment of paroxysmal supraventricular tachycardia in the elderly

Clinical Research on Effects of Valsartan on Patients with Essential Hypertension Complicated with Paroxysmal Atrial Fibrillation

Characteristics of electrical connections between atria and pulmonary veins in patients with paroxysmal atrial fibrillation

Electrical isolation of big veins by radiofrequency catheter ablation for the treatment of paroxysmal atrial fibrillation

Effective and safety of the treatment of transvenous low dose amiodarone by minipump in patients of paroxysmal atrial fibrillation

Clinical Observation of Paroxysmal Atrial Fibrillation Changing Into Permanent Atrial Fibrillation

Clinical Approach of Detective Function for Paroxysmal Atrial Fibrillation by the Pacemaker With Automatic Mode Switch

Observation on the Abnormalities of Electronic Modulation T-wave after Paroxysmal Supraventricular Tachycardia

Investigation of the mechanism of paroxysmal atrial fibrillation in patients with Wolff-Parkinson-White syndrome

Investigation of the mechanism of paroxysmal atrial fibrillation in patients with Wolff-Parkinson-White syndrome

Clinical features and pedigree analysis of Chinese infantile convulsions with paroxysmal choreoathetosis

Clinical observation on wrist-ankle acupuncture for treatment of paroxysmal supraventricular tachycardia

The short-term efficacy of the patients with sick sinus syndrome and paroxysmal atrial fibrillation by special modes of pacing therapies

Thermal Stratification and Paroxysmal Deterioration of Water Quality in a Canyon-Reservoir, Southwestern China

Multivariate Analysis of the Determinant Factors Related to Syncope During Paroxysmal Supraventricular Tachycardia

Combination with amiodarone and simvastatin for the treatment of patients with paroxysmal atrial fibrillation

Dynamic electroencephalogram monitoring in evaluation of paroxysmal cerebral disorder in children

Radiofrequency Catheter Linear Ablation of the Right Atrium to Treat Paroxysmal Atrial Fibrillation

Evaluation of radiofrequency catheter ablation in treating patients with paroxysmal atrial fibrillation

Evaluation of radiofrequency catheter ablation in treating patients with paroxysmal atrial fibrillation

Efficacy and safety of intravenous metoprolol and verapamil for paroxysmal supraventricular tachycardia

A Study of Chinese News Disseminating System Concerning Paroxysmal Events

Expression of Apoptosis-related Proteins in Bone Marrow Neutrophils of Patients with Paroxysmal Nocturnal Hemoglobinuria

Clinical Observations on the Treatment of Paroxysmal Deafness with Electroacupuncture Plus Hyperbaric Oxygen

Comparison of different pulmonary vein isolation strategies for patients with paroxysmal atrial fibrillation

Radiofrequency ablation for the treatment of paroxysmal atrial fibrillation in complicated cases

The diagnosis evaluation of paroxysmal palpitation by esophageal electrophysiology

Effects of paroxysmal atrial fibrillation on plasma levels of brain natriuretic peptide in the elderly patients with essential hypertension

Present situation of radiofrequency catheter ablation in patients with paroxysmal atrial fibrillation

Effects of Different Treatments on Patients with Paroxysmal Supraventricular Tachycardia

Etiopathogenesis, Clinical Diagnosis and Therapy of Benign Paroxysmal Positional Vertigo

Insight to the Effectiveness of Single Atrium-Vein Electrical Isolation to Patients With Paroxysmal Atrial Fibrillation

Effects of propafenone and amiodarone on paroxysmal atrial fibrillation after thoracic operation: A comparative study

Occlusion the posterior semicircular canal using laser for treatment the complex benign paroxysmal positional vertigo

The influence of irbesartan on recurrence for patients with paroxysmal atrial fibrillation after pulmonary veins isolation

Medium and Long-term Development Strategic Research of Mitigating Significant Paroxysmal Natural Disasters

Treatment for patients with recurrent paroxysmal atrial fibrillation after pulmonary veins isolation

Analysis of ambulatory electrocardiogram of paroxysmal atrial fibrillation

Action Logic and Reconstruction of the Logic Presumption in Advance in Handling the Paroxysmal Events in Earlier Period

Early Experience With Pulmonary Vein Isolation in Patients With Paroxysmal Atrial Fibrillation by Using a Circular Cryoablation Catheter

The efficacy of the combination of ATP with atropine in the treatment of paroxysmal supraventricular tachycardia

Irrigated-tip catheter ablation for electrical isolation of atrium-pulmonary vein to treat paroxysmal atrial fibrillation

Effects of radiofrequency ablation for paroxysmal atrial fibrillation originating from the pulmonary veins

Clinical application of special pacing algorithm on preventing paroxysmal atrial fibrillation

Clinical Effects of Enalapril in Preventing Recurrence of Idiopathic Paroxysmal Atrial Fibrillation

Circumferential linear ablation of paroxysmal atrial fibrillation guided by three-dimensional electroanatomical system

Electrical Isolation of Pulmonary Veins in Patients With Paroxysmal Atrial Fibrillation Guided by Lasso Mapping Catheter

The Observing of paroxysmal Tachycardia Induced by the Combination of Isoproterenol and Atropine

Muscle Sleeve Electrical Isolation for Recurrent Cases of Paroxysmal Atrial Fibrillation After Focal Ablation

Characterizations of atrial contractions triggering paroxysmal atrial fibrillation and the effect of atrial fibrillation prevention pacing

Efficacy and safety of low-dose amiodarone for paroxysmal atrial fibrillation in patients with no-valvular heart diseases

Diagnosis of horizontal semicircular canal benign paroxysmal positional vertigo

Efficacy Evaluation of Recovering Paroxysmal Supraventricular Tachycardia with ATP and ATP plus Atropin

The dynamic electrocardiogram analyse in the elderly paroxysmal auricular fibrillation

A case of paroxysmal mass unidentified fever among students in middle school

An Analysis of Holter Monitoring on Paroxysmal Atrial Fibrillation Triggered by Premature Atrial Contraction

Anticoagulation Therapy in Patients With Paroxysmal Atrial Fibrillation Before and After the Pulmonary Vein Isolation

Evaluation of atrial conduction disturbance in patients with paroxysmal atrial fibrillation

Effect of Different Velocity of Propafenone on Conversion of Paroxysmal Supraventricular Tachycardia

The application of nursing procedure during the management on paroxysmal accident rescue

The study of surface electrocardiographic markers for the prediction of paroxysmal atrial fibrillation

Diagnosis and Treatment for Paroxysmal Supraventricular Tachycardia in Infants

6organize the production meeting periodically, coordinating and solving the problems in production timely. handle paroxysmal affairs;

Comparison of varied treatment for emergency cardioversion of paroxysmal atrial fibrillation in the aged patients

Viewing the Manipulation of the Paroxysmal Events from Angel of Institutional Philosophy

Treatment with atorvastatin and amiodarone in patients with paroxysmal atrial fibrillation

Study on Clinical and Laboratory Features of Childhood Paroxysmal Nocturnal Hemoglobinuria

Comparison of Two Methods to Make Paroxysmal Cerebral Hemorrhage Rat Model by Injecting Bloodinto Cerebral

Comparison of efficacy and safety of oral amiodarone and propafenone in patients with paroxysmal atrial fibrillation

Clinical Observation on Rapid Paroxysmal Auricular Fibrillation Prevented and Cured by Alliaceous Oil

Efficacy and safety of antiarrhythmics for prevention of recurrence of paroxysmal atrial fibrillation

The clinical research of GFA hydrochloride in the treatment of paroxysmal supraventricular tachycardia

Clinical analysis of neonate paroxysmal nocturnal hemoglobinuria

Curative Effect of Propafenone on Paroxysmal Supraventricular Tachycardia

Safety and Efficacy of Intravenous Bolus Administration of Adenosine for Termination of Paroxysmal Supraventdcular Tachycardia

Inspiration and Thinking from Urban Commercial Development after Paroxysmal Public Crisis

Observation of therapeutic effect of bisoprolol for treatment of paroxysmal auricular fibrillation

Clinical observation on catgut implantation at acupoint for treatment of general paroxysmal epilepsy

Effect of different anti-arrhythmic agents on patients with paroxysmal atrial fibrillation and congestive heart failure

The effect of losartan or amlodipine on hypertension left ventricular hypertrophy complicated with paroxysmal atrial fibrillation

The value of Holter monitoring in diagnosing paroxysmal atrial fibrillation triggered by premature atrial contraction

Dynamic overdrive atrial pacing prevent paroxysmal atrial fibrillation

Treatment of paroxysmal supraventricular tachycardia in pregnant woman

Analysis on the Emergency-monitor Ability of the Paroxysmal Pollution Accident in Shenyang City

Evaluation of the Episodes of Paroxysmal Atrial Fibrillation by Holter Monitoring

Clinical study on the relationship between atrial late potential and paroxysmal atrial fibrillation

Application of DDD Pacemaker with Dynamic Atrial Overdrive System in Paroxysmal atrial Fibrillation

Clinical Efficacy of Perindopril and Low-Dose Amiodarone in Patients With Paroxysmal Atrial Fibrillation

Analysis of Radiofrequency Catheter Ablation for the treatment in 35 cases of Paroxysmal Supraventricular Tachycardia

Comparison of the Effect of Amiodaron and Propafenone on Cardioversion of Paroxysmal Auricular Fibrillation

Efficacy of Combine Treatment of Perindopril and Diltiazem for Paroxysmal Atrial Fibrillation

Localization role of BEAM selective editor for paroxysmal epileptiform discharges

Prognosis factors affecting CRP treatment in benign paroxysmal positional vertigo

An Analysis on the Change of Dimensions of the Left Atria in the Patients with Paroxysmal Atrial Fibrillation

Evaluating the method of segmental isolation of pulmonary veins in patients with paroxysmal atrial fibrillation

Effect of Oral Propafenone on Reversing Paroxysmal Atrial Fibrillation with No Rheumatic Disease

Analysis of Video-Electroencephalogram in Cerebral Palsy with Paroxysmal Symptom in Children

Analysis of clinical manifestation and dynamic ECG in aged paroxysmal auricular fibrillation

The Economics Analysis of the Phenomena of Individual's Scare Buying Goods under Paroxysmal Event

The Analysis of Recurrent Factors in Paroxysmal Supraventricular Tachycardia with RFCA

Strengthening Government Management in Public and Paroxysmal Affairs

Observation on Effect of Amiodarone in Treatment of Hypertension with Paroxysmal Atrial Fibrillation

Study on Nursing Effect of ATP Used in Treating Children Paroxysmal Superventricular Tachycardia

Diagnosis and treatment of various benign paroxysmal positional vertigo variants

Risk factors of paroxysmal atrial fibrillation in patients with acute myocardial infarction

Left Atrial Catheter Ablation for Paroxysmal Atrial Fibrillation Guided by Non-contact Mapping System

Research of Interfering and Countermeasure to Paroxysmal Events in Local-Scale Sports Activities

Predictors and risk factors of recurrence of paroxysmal atrial fibrillation after focal ablation

Discussion on hygienic and anti-epidemic emergency scheme for disasters and paroxysmal accidents

Characteristics of the onset of paroxysmal atrial fibrillation

Analysis of relationship between P-wave dispersion and paroxysmal atrial fibrillation

Discussion About Equipment Support of Paroxysmal Incident in Altiplano's and Extremely Frigid Border

Value of maximum P-wave duration and P-wave dispersion to the prediction of idiopathic paroxysmal atrial fibrillation

The efficacy and safety of small dose amiodarone in the prevention of patients with paroxysmal atrial fibrillation

The effect of radiofrequency catheter ablation on paroxysmal supraventricular tachycardia in children

Online Detective and Identified Technology of Paroxysmal Trouble in Transformer

Oral loading dosage propafenone in conversion of paroxysmal atrial fibrillation

Relationship between paroxysmal atrial fibrillation and P-wave dispersion

Left atrial linear ablation of paroxysmal atrial fibrillation guided by three-dimensional electroanatomical system

The response of bone marrow hematopoietic cells to G-CSF in paroxysmal nocturnal hemoglobinuria patients

Pulmonary venous isolation using radiofrequency ablation in 20 paroxysmal atrial fibrillation patients

The clinical valuation of paroxysmal atrial fibrillation with ventricular long pause

Analysis of paroxysmal atrial fibrillation and blood pressure variability in elderly

The characteristic of the paroxysmal ventricular tachycardia in the elderly patients--40 cases Holter analysis

The Concept and Evaluation Principle of Economic Loss for Paroxysmal Water Pollution Incidents

The nurse of paroxysmal supraventricular tachycardia on treated with RF melting - therapy

The Experience of Radiofrequency Catheter Ablation in the Treatment of 310 Cases with Paroxysmal Supraventricular Tachycardia

The cause with turbine paroxysmal vibration diagnose and treat

Catheter Ablation for the Treatment of Paroxysmal Atrial Fibrillation in the Elderly

Analysis of 82 cases with paroxysmal supraventricular tachycardia undergoing radio-frequency ablation

Circadian variation of paroxysmal atrial fibrillation

Analyses of 37 paroxysmal supraventricular tachycardia after the treatment of radiofrequency catheter ablation

Efficacy of bolus dose of domestic propafenone to reverse paroxysmal atrial fibrillation

The relationship between P-wave dispersion and paroxysmal atrial fibrillation

Effect of atomized inhalation of ventolin combined with pulmicort in treatment of acute paroxysmal asthma

Therapeutic effect of propofenone on paroxysmal supraventricular tachycardia

Comparing the effect of Propafenone and Verapamil on Paroxysmal Supraventricular Tachycardia

Experiences from the Treatment of 45 Cases of Supraventricular Paroxysmal Tachycardia Treated with Radio Frequency Melting

Effect of irbesartan on preventing recurrence of paroxysmal atrial fibrillation