Question

compare and contrast the rules for sinus bradycardia, sinus tachycardia, premature atrial contraction, atrial flutter, atrial fibrillation, and third-degree atrioventricular block. Explain why each differs from the norm- what is going on internally?

Answer 1

Ans) Sinus bradycardia is a sinus rhythm with a rate that is lower than normal. In humans, bradycardia is generally defined to be a rate of under 60 beats per minute. Sinus bradycardia. Sinus bradycardia seen in lead II with a heart rate of about 50.

- Sinus tachycardia (also colloquially known as sinus tach or sinus tachy) is an elevated sinus rhythm characterized by an increase in the rate of electrical impulses arising from the sinoatrial node. In adults, sinus tachycardia is defined as a heart rate greater than 100 beats/min (bpm).

- Premature atrial contractions (PACs), also known as atrial premature complexes (APC) or atrial premature beats (APB), are a common cardiac dysrhythmia characterized by premature heartbeats originating in the atria. While the sinoatrial node typically regulates the heartbeat during normal sinus rhythm, PACs occur when another region of the atria depolarizes before the sinoatrial node and thus triggers a premature heartbeat.

Aterial flutter:

A condition in which the heart's upper chambers (atria) beat too quickly.

Aterial fibrillation:

An irregular, often rapid heart rate that commonly causes poor blood flow.
The heart's upper chambers (atria) beat out of coordination with the lower chambers (ventricles).

Third-degree atrioventricular block (AV block) is a medical condition in which the nerve impulse generated in the sinoatrial node (SA node) in the atrium of the heart can not propagate to the ventricles.