MUSCLE
CARDIAC MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Inotropism
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Dromotropy
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Chronotropism
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Lustropy
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Detailed explanation-1: -Increases in inotropic state help to maintain stroke volume at high heart rates and elevated arterial pressures. Increased heart rate alone decreases stroke volume because of reduced time for diastolic filling, which decreases end-diastolic volume.
Detailed explanation-2: -Inotropic – affects contractility. Chronotropic – affects heart rate (increase or decrease) Positive chronotropic drugs increase heart rate. Negative chronotropic drugs decrease the heart rate.
Detailed explanation-3: -Inotropy and contractility are essential synonymous-inotropes are agents that increase contractility. the slope of the end-systolic pressure volume relationship (ESPVR) curve indicates the maximum rate of force development by the ventricle.