ROSC stands for which of the following?

• A. Return of spontaneous circulation
• B. Recovery of stable heart rate
• C. Return of spontaneous circulation with adequate perfusion
• D. Restoration of sinus rhythm after resuscitation

Answer: (C)

In resuscitation, the crucial milestone is not just the heart starting to beat again, but that blood flow to the organs has resumed at a level that can sustain life. Return of spontaneous circulation with adequate perfusion captures both aspects: the heart is beating on its own and tissues are receiving enough blood flow to meet metabolic needs. That combination is what clinicians use to define ROSC in practice.

The other ideas miss this full picture: merely a return of spontaneous circulation can occur without enough perfusion, making organ ischemia possible; recovering a stable heart rate doesn’t address whether enough blood is being delivered; and restoring sinus rhythm after resuscitation focuses on rhythm rather than the actual effectiveness of circulation.