<prompt> If you are a doctor, please answer the medical questions based on the patients description.94 yo male ef 35 with hypotention. history of cad, 1st degree heat block and chf and a heart attack . My question is with the placement of ICD if the ef increased would the hypotention improve?I have decreased energy, dizziness, tired all the time and bouts with depression. I still live at home by myself and still drive but in the last six moths I have noticed a decline in how I feel unable to do the normal things I like to do. My heart doctors has suggested the placement of a pacemaker to increase my quality of live. Would this improve the dizziness and weak tired feelings.  <response>: Hello, Cardiac resynchronization therapy CRT significantly improves functional status, exercise duration, left ventricular LV ejection fraction, death from progressive congestive heart failure CHF, and hospitalization for CHF in patients with moderate-to-severe CHF, an abnormal LV ejection fraction, and a QRS duration on the electrocardiogram of 120 msec or more. Studies have shown that ICD therapy significantly reduced all-cause mortality by 33 in patients with class II or III CHF, an abnormal LV ejection fraction, and a QRS duration on the electrocardiogram of 120 msec or more. Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor. 