How does the heart rate in cardiogenic shock differ from that in volume shock?

In cardiogenic shock, the heart's ability to pump effectively is compromised, often leading to a reduced cardiac output. This condition arises from various issues such as heart attack, heart failure, or severe arrhythmias. As a result, the body tries to compensate for this decreased output and maintain perfusion to vital organs by increasing heart rate. However, the irregular heart rhythm can occur because the underlying issues affecting the heart's ability to contract properly also disrupt the normal electrical conduction system.

In contrast, volume shock, often related to conditions like hypovolemic shock, is characterized by a decrease in circulating blood volume, which can trigger a compensatory increase in heart rate, but usually not to the same extent as in cardiogenic shock. The heart rhythm remains more regular as the body attempts to compensate for the fluid loss.

Thus, the fact that cardiogenic shock may result in an irregular heart rhythm points to the underlying dysfunction of the heart, making this choice correct.