Mr. Anderson, a 58-year-old schoolteacher, complains of dizziness. He has been experiencing fatigue and chest pain since. He has a history of hypertension and has been taking his medication regularly. His general health is otherwise good. He is worried that he has a heart block and needs a pacemaker.  What is Heart Block? It is…

John is a 65-year-old man. He has recently noticed swelling in his legs and gets tired more often than he used to. He gets shortness of breath more often when he goes for a short walk. His doctor thinks he could have heart failure. What is Heart failure? Our heart acts as a pump. It…