The major risk factors were hypokalemia, and severe arrhythmias including intraventricularblock, ventricular parasystole and ventricular premature beats.
分析猝死的诱因主要有血清钾浓度降低，严重心律失常，包括室内传导阻滞、室性并行心律、室性早搏等。
2
Conclusion Biventricular pacing can improve cardiopulmonary function, exercise tolerance and quality of life in patients with congestive heart failure and intraventricularblock.