Changes in pressure waveforms with VT

Pressure waveforms with ventricular tachycardia (VT). Top left: Right atrial (RA) pressure tracing shows prominent "v" wave. Top right: With restoration of sinus rhythm, there is a slight reduction in the mean RA pressure; the "v" wave is attenuated and a normal RA pressure waveform is seen. A similar response can be seen in the pulmonary capillary wedge (PCW) pressure tracing. Bottom left: During sinus rhythm, the mean PCW pressure is 18 mmHg and there is a "v" wave of 24 mmHg. Bottom right: During ventricular tachycardia, the mean PCW pressure increases to 24 mmHg with "v" waves of 40 mmHg.