ECG Suggesting basic presence of basic heart diseases Atrial and ventricular hypertrophy myocardial ischemia or infarction arrhythmia lptf -0. 03mm/s, indicating left atrial overloading.16 ECG • Suggesting basic presence of basic heart diseases • Atrial and ventricular hypertrophy, myocardial ischemia or infarction , arrhythmia • V1ptf＜－0.03mm／s，indicating left atrial overloading