Cardiovascular Anatomy and Function

Overview

The cardiovascular system is a closed circuit that transports nutrients, gases, and wastes throughout the body. It relies on the heart as a pump and a network of vessels to maintain homeostasis. Nurses must understand the electrical and mechanical functions of the heart to identify life-threatening arrhythmias or pump failure.

Key nursing concepts

• Anatomy of the heart chambers and four heart valves.
• Path of blood flow through pulmonary and systemic circuits.
• The cardiac conduction system starting at the SA node.
• Components of the cardiac cycle: systole and diastole.
• Regulation of blood pressure by resistance and volume.
• The role of coronary arteries in nourishing the myocardium.

Important nursing considerations

• Assess apical pulse for one full minute if irregularities are noted.
• Monitor blood pressure trends to evaluate cardiac output and perfusion.
• Check peripheral pulses and capillary refill for circulatory status.
• Evaluate for edema in dependent areas as a sign of fluid volume excess.
• Review electrolyte levels especially potassium and calcium for heart rhythm effects.
• Recognize that chest pain may manifest differently in women and diabetics.

Patient teaching

• Explain the importance of a low-sodium diet for blood pressure control.
• Encourage regular aerobic exercise to strengthen the heart muscle.
• Teach patients how to self-monitor pulse rate and rhythm.
• Advise on signs of poor circulation like cold extremities or numbness.

Related practice questions

Real questions from the NursGuru bank, each with the answer and rationale.

1. Practice question 1 →
2. Practice question 2 →
3. Practice question 3 →
4. Practice question 4 →
5. Practice question 5 →

Cardiovascular Anatomy and Function flashcards

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