Figure 2.

Graphic recording of aortic pressure (AoP), air flow signal, and end-tidal CO2 (EtCO2) curves in anesthetized swine during: A) Spontaneous breathing during normal sinus rhythm, B) Spontaneous breathing following the induction of ventricular fibrillation (VF), and C) Gasping during untreated VF. Note the relative plateau in the inspiratory air flow of the spontaneous breaths compared with the sharp "peak" in the air flow of the gasps.

Zuercher et al. BMC Cardiovascular Disorders 2010 10:36   doi:10.1186/1471-2261-10-36
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