If a patient's cardiac preload suddenly decreases during rapid blood loss, which consequence follows related to cardiovascular hemodynamics?

💡 Explanation

Decreased preload reduces the ventricular filling volume, diminishing the end-diastolic volume, which, through the Frank-Starling mechanism, leads to decreased stroke volume and, therefore, cardiac output and blood pressure. This occurs because of reduced myocardial stretch; therefore, cardiac output falls rather than rising due to compensatory mechanisms.

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