What is atrial standstill?
Atrial standstill is a rare arrhythmogenic condition characterized by the absence of electrical and mechanical activity in the atria, transient or persistent, and complete or partial.
How is atrial standstill treated?
The treatment of atrial standstill is focused on the consequences and potential complications of this disorder, and can include pacemaker implantation, treatment of heart failure with diuretics and vasodilators, and prevention of thromboembolism with oral anticoagulation therapy [3, 18].
Why does hyperkalemia cause atrial standstill?
In atrial standstill due to hyperkalemia, SA nodal discharge occurs, but atrial depolarization is blocked by the effects of hyperkalemia. As there is no atrial depolarization, P waves are absent.
What is ventricular standstill?
Ventricular standstill (VS) is a rare electrophysiological abnormality. The name describes what happens — the heart stops beating and stands perfectly still. No blood is pumped and the results are the same as ventricular fibrillation (VFib).
Is ventricular standstill the same as asystole?
Ventricular standstill (also called ventricular asystole) is a potentially lethal arrhythmia if not treated promptly. It occurs when there is cessation of supraventricular impulse formation or blockage in the transmission of these impulses from the atria to the ventricles resulting in asystolic cardiac arrest.
What is a junctional tachycardia?
Junctional tachycardia is a form of supraventricular tachycardia, a type of racing pulse caused by a problem in the area between the upper and lower chambers of your heart. It’s known as the atrioventricular node, or AV node.
What is wandering atrial pacemaker?
When you have a wandering atrial pacemaker, control of your heartbeat shifts from your SA node to other parts of your atria, the two upper chambers of your heart. When that happens and your heart continues to beat at a normal rate, you have a wandering atrial pacemaker.
What causes a cardiac pause?
Sinoatrial exit block. Signals to the upper heart chambers are slowed or blocked, causing a pause or skipped beats.
Can ventricular standstill be paced?
Ventricular standstill – P waves (atrial contraction) only on the ECG. Note that although pacing is not indicated in asystole, always carefully check the ECG for the presence of P waves (ventricular standstill) as this may respond to pacing (Nolan et al, 2005).
