Hello, I'm an expert in the field of emergency medicine with a focus on cardiac conditions. When comparing a fib (atrial fibrillation) and V fib (ventricular fibrillation), it's important to understand the nature of each condition and their respective impacts on the body. Atrial fibrillation (AFib) is a common type of irregular heartbeat that affects the upper chambers of the heart (atria). It's often not life-threatening by itself, but it can lead to complications such as stroke if not managed properly. Ventricular fibrillation (VFib), on the other hand, is a life-threatening emergency. It's a condition where the heart's lower chambers (ventricles) quiver chaotically instead of pumping blood effectively. This can lead to sudden cardiac arrest, which is often fatal if not treated immediately with defibrillation. In terms of severity and urgency, V fib is worse because it poses an immediate risk to life. AFib, while serious, is not typically an immediately life-threatening condition. read more >>

Ventricular fibrillation (v-fib for short) is the most serious cardiac rhythm disturbance. The lower chambers quiver and the heart can't pump any blood, causing cardiac arrest.read more >>