AV nodal reentrant tachycardia
Similar to accessory pathway tachycardias , AV nodal reentrant tachycardia may cause heart failure, palpitations, or even fainting. In some cases, individuals may need no medical treatment as simple maneuvers such as proper breathing or bearing down can temper their heart rate. Other cases require medical treatment, and your doctor may also prescribe drugs to regulate heart rhythm.
Ventricular tachycardia (V-tach)
Originating from the lower chambers of the heart, V-tach is a rapid heart rhythm that prevents the heart from filling up with blood. This is an emergency situation immediately requires immediate medical attention and care.
In this condition, because of its erratic and disorganized firing of impulses, the heart’s ventricles have a difficult time pumping blood into the body. This delicate and dangerous condition requires immediate medical attention and care.
Long QT syndrome
The QT interval is the measurement on the electrocardiogram that shows the time electrical impulses fire and then recharge. This represents the time the heart muscle contracts and then recovers. If the QT interval becomes longer than normal, then this may hint at a possible life-threatening condition. This can also cause sudden death in young people, and can only be treated with the use of a pacemaker, electrical cardioversion, ablation therapy, or implanted cardioverter/defibrillator.
Types of Bradyarrhythmias
Sinus node dysfunction
This is a slow heart rhythm that is caused by the abnormal SA (sinus) node. For SAs that cause symptoms, such as light-headedness, dizziness, fainting, or syncope, doctors may recommend a pacemaker.