The main symptoms were similar to angina pectoris and to left heart failure.
其常表现为类似心绞痛、类似左心衰的症状，可伴有心律失常；
Left untreated, some arrhythmias can lead to stroke, heart failure, or sudden death.
如果不进行治疗，一些心律失常可能导致中风，心衰或猝死。
Left untreated, some arrhythmias can lead to stroke, heart failure, or sudden death.
如果不进行治疗，一些心律失常可能导致中风，心衰或猝死。
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