Heart Anatomy and Electrical Conduction System Diagram #3540239 (License: Personal Use)

This anatomical illustration depicts a sagittal section of the human heart, revealing the four chambers, major valves, and the specialized cardiac conduction system-including the sinoatrial (SA) node, atrioventricular (AV) node, and Bundle of His. A blue electrocardiogram (ECG) waveform runs alongside, correlating electrical activity with mechanical contraction phases. The inset provides a close-up of the SA and AV nodes, emphasizing their role in initiating and regulating heartbeat rhythm.

Used in medical education, cardiology patient resources, or health websites to explain how the heart generates and conducts electrical impulses that trigger contractions; matches user intent for learning about arrhythmias, ECG interpretation, or basic cardiovascular physiology.