sinoatrial block

A third degree sinoatrial block looks very similar to a sinus arrest.

Second-degree Sinoatrial block and nodal rhythm were described.

Sinoatrial blocks are typically well tolerated.

The clinical relevance pertaining to AV blocks is greater than that of sinoatrial blocks.

Severe sinoatrial block (without pacemaker)

This condition is sometimes confused with sinoatrial block, a condition in which the pacing impulse is generated, but fails to conduct through the myocardium.

In a first degree sinoatrial block, there is a lag between the time that the SA node fires and actual depolarization of the atria.

The third, Sick sinus syndrome, covers conditions that include severe sinus bradycardia, sinoatrial block, sinus arrest, and bradycardia-tachycardia syndrome (atrial fibillation, flutter, and paroxysmal supraventricular tachycardia).