Ventricular pressure tracing vs arterial pressure tracing
The diastolic pressure is very low in a ventricular pressure tracing, compared to an arterial pressure tracing. But the arterial pressure tracing can have a low diastolic pressure in aortic regurgitation. Ventricularization of a coronary artery pressure tracing can occur when the engagement of the catheter is not proper and produces wedging of the catheter within the artery. Wedging is more likely in an artery with ostial stenosis or when a larger sized catheter than the artery is used.
While measuring ventricular and femoral arterial pressure simultaneously, if a single sheath is being used, the sheath diameter has to be significantly larger than that of the catheter.