Heart arrhythmias result from disturbances in the rate, regularity, or origin of the heart's electrical signals. They are divided into two groups - one including life-threatening ventricular fibrillation and tachycardia requiring immediate defibrillation, and another including less dangerous arrhythmias that may still require treatment. Ventricular arrhythmias like ventricular tachycardia and fibrillation involve abnormal electrical signals originating in the ventricles. These can cause symptoms like fainting, chest pain, or shortness of breath and carry risks like inadequate blood flow leading to cardiac arrest if not terminated quickly.

1. Heart Arrhythmias

2. What is Heart Arrhythmias?
 Heart Arrhythmias result from any disturbance in the rate, regularity,
and site of origin or conduction of the cardiac electric impulse.
 Heart Arrhythmias is divided into two groups.
 First group includes Ventricular fibrillation & tachycardia, which are
life-threatening and require immediate therapy with a defibrillator.
 Second group include arrhythmias that are not imminently life-threatening
but may require therapy to prevent further problems.

3. What is ventricular arrhythmia?
 Ventricular arrhythmias include ventricular tachycardia and
ventricular fibrillation.
 To diagnose an arrhythmia, your doctor will typically start with
an electrocardiogram (ECG) test.

4. What is Ventricular Tachycardia(VT)
 Ventricular tachycardia is a fast heart rhythm that occurs in one
of the ventricles (i.e. Lower Chambers) of your heart.
 Here, electrical impulses circulate in an endless loop ( It is like
one electrical short circuit that races in a circle).
 One special type of ventricular tachycardia is called “Right
Ventricular Outflow Tachycardia”. This rhythm occurs in the part
of the heart where blood is going from the right ventricular to
the lungs.

5. Abnormal electrical signals in
ventricles:

6. What is Ventricular Fibrillation(VF)
 Ventricular fibrillation originates from many different locations in
the ventricles, each one trying to signal the heart to beat.
 In this case, the heart beats much faster than normal, sometimes
over 300 beats a minute.
 It is an abnormal heart rhythm that is disorganized and irregular.
 The lower chambers quiver instead of contract.

7. Ventricular Fibrillation:

8. What are the symptoms of VT & VF
 Ventricular Tachycardia & Ventricular Fibrillation occur most
commonly in people who have damaged heart muscle or
coronary artery disease.
 These include fainting without warning and even sudden death.
 In the cases of VT, sometimes patients feel chest pain, shortness
of breath, or sweating.

9. What are the risks of VT & VF?
 Rapid heart rates of the lower heart chambers prevent VF & VT
from having adequate time to fill with blood.
 As a result, the heart does not pump effectively; the heart
muscle, brain, and other parts of the body do not get adequate
blood supply, which can result in fainting and even loss of life.
 VT can often be diagnosed and treated but VF almost always
results in cardiac arrest and death if not terminated quickly. This
is termed “sudden cardiac death”.