question: Dear Dr.,My father aged 71 yrs has undergone an ECG and the findings are as under:1. Sinus rhythm with marked sinus arrhythmia2. T wave abnormality, consider lateral ischemia3. Prolonged QTThe measurements are as follows:QRS:96msQT/QTcB:452/462msPR:166msP:128msRR/PP:1088/880msP/QRS/T:56/26/100degrees.Pls advice