Ahmad is a 66-year-old male patient who has mild to moderate heart failure. This patient takes a drug that causes partial inhibition of Na Ca exchanger at the membrane of cardiomyocytes. This drug will increase all of the following except: a. The refractory period b. Cardiac cycle length c. Number of heart beats per minute d. The duration of plateau phase of action potential
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These drugs work by blocking the influx of calcium ions into cardiac muscle cells, which slows down the heart rate and reduces the force of the heart's contractions. a. The refractory period: This is the time during which a new action potential cannot be Show more…
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