atrial pressure

Is Systole A Contraction Or Relaxation?

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Is Systole A Contraction Or Relaxation? Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase. At a normal heart rate, one cardiac cycle lasts for 0.8 second. Is systole the contraction phase? The cardiac cycle is essentially split into two phases, systole (the contraction phase) and diastole (the relaxation

What Effect Does Atrial Natriuretic Peptide Have?

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What Effect Does Atrial Natriuretic Peptide Have? What effect does atrial natriuretic peptide have? For example, atrial natriuretic peptide (ANP) is a small peptide secreted by the heart upon atrial stretch and high systemic blood pressure. The acute effects of this potent, short-lived peptide include increased glomerular filtration and increased renal excretion of sodium and