HESI 4 Critical Care MCA 3 Practice Test 2026 – Your All-in-One Guide to Exam Success!

Rupture of an abdominal aortic aneurysm causes massive internal bleeding, leading to a rapid loss of circulating blood volume. With less blood returning to the heart, preload and cardiac output fall, and tissues become underperfused, producing hypovolemic shock. This is the type most likely because the primary problem is hemorrhage and volume loss, not a blockage of flow, loss of vascular tone, or the heart’s pumping ability. Obstructive shock involves a mechanical barrier to blood flow (like tamponade or PE), neurogenic shock slides from loss of sympathetic vascular tone causing vasodilation, and cardiogenic shock results from the heart failing to pump effectively. So the presentation aligns with hypovolemia: hypotension, tachycardia, and signs of poor perfusion due to blood loss.