Regurgitation: An incompetent valve that does not close properly allows blood to leak backward. Cardiac output, the volume of blood the heart pumps per minute, is a fundamental metric of cardiovascular health.
Cardiac Output Decrease Mechanical Factors
Pericardial and Mechanical Constraints Cardiac tamponade occurs when fluid accumulates in the pericardial sac, creating pressure that squeezes the heart and prevents diastolic filling. Valvular pathologies force the heart to work harder, often against its own output, leading to fatigue and reduced efficiency.
Stenosis: A valve that fails to open fully creates a bottleneck, obstructing blood flow from a chamber. When the myocardium weakens, it cannot generate sufficient pressure to eject an adequate stroke volume, leading to a drop in overall cardiac performance.
Cardiac Output Decrease Mechanical Factors
This increases the pressure the heart must generate, reducing the volume of blood ejected with each beat. In tachycardia, the heart rate is so fast that the diastolic filling period is truncated, leading to insufficient preload.
More About What causes decreased cardiac output
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