Evaluating Sustained Ventricular Fibrillation Accurately

Dr. Rajan Bhatt is a longtime Scottsdale, Arizona, medical practitioner who leads medical practices such as Spectrum Dermatology & Vein Center. Extensively published in his field, Dr. Rajan Bhatt coauthored “Cardiac magnetic resonance imaging investigation of sustained ventricular fibrillation (VF) in a swine model-with a focus on the electrical phase” (Resuscitation, 2007).

This research aimed to develop a method for evaluating cardiac dimensions, which change quickly during sustained ventricular fibrillation (an irregular heartbeat impacting the heart’s ventricles). A primary obstacle to effective evaluation is the fact that conventional forms of cardiac magnetic resonance imaging (CMR) do not provide sufficient temporal resolution to accurately the capture dynamic changes that take place during VF’s early stages.

Dr. Bhatt hypothesized that measurable changes in the middle short axis slice of the ventricles would accurately reflect overall ventricular volume changes. His findings demonstrated that, over the course of half an hour of sustained VF, ventricular volume changes correlated closely with changes in the exact mid-slice area. This suggests that mid-slice area data works well as a surrogate marker of changes that occur to the heart during ventricular fibrillation.