Capability of the right ventricle.

Area of Science:

• Cardiology
• Physiology

Background:

• The right ventricle's role in systemic circulation is often secondary to the left ventricle.
• Its capacity to sustain long-term systemic workload is debated.
• Pulmonary vascular resistance significantly impacts right ventricular function.

Purpose of the Study:

• To review the functional limitations of the right ventricle in various clinical scenarios.
• To evaluate the long-term viability of systemic circulation without a fully functional right ventricle.

Main Methods:

• Literature review of studies examining right ventricular function.
• Analysis of clinical cases with altered right ventricular output.
• Discussion of physiological adaptations to congenital heart defects affecting the right ventricle.

Main Results:

• The right ventricle exhibits limited capacity for sustained systemic work, especially after acute increases in pulmonary vascular resistance.
• Survival and quality of life are possible even with absence of the right ventricle, with direct systemic-to-pulmonary shunting.

Conclusions:

• The right ventricle has inherent limitations in performing lifelong systemic work.
• Alternative circulatory pathways can support life without a functional right ventricle, challenging traditional cardiovascular physiology.