Question

Answer the following questions on Bulleting Board

6) identify ectopic "beats" and rhythms

7) Accurately interpret a variety of EKG rhythms from 6 second trips

8) Demonstrate knowledge of physiologic and pharmacologic effectson EKG

Answer 1

Answer: Ectopic beats are more common during periods of stress, exercise or debility; they may also be triggered by consumption of some food like alcohol, strong cheese, or chocolate. Ectopic beats are a type of cardiac arrhythmias, which is a variety of cardiac abnormalities relating to rate or rhythm of the cardiac cycle.

The 2 most common types of ectopic heartbeats are:

• Premature ventricular contractions (PVC)
• Premature atrial contractions (PAC)

Answer: The electrical conduction system of the heart is a system of interconnected structures that allow the passage of electrical impulses through the heart muscle.These electrical impulses are generated in a specific sequence, and are the impulses that generate the wave tracing that comprise the cardiac rhythm strip.This specific sequence gives us the basic foundation by which rhythm strip
the analysis in conducted. The AV node (or atrioventricular node) comprises a portion of the tissues of the AV junction; which includes some surrounding tissue and the bundle of His. The AV node slows down the conduction process, which results in a slight delay before the electrical impulse reaches the ventricles. The AV node has an intrinsic rate of 40-60 beats per minute.

Answer: Physiologic effects on ECG are the parasympathetic fibers innervate both SA node and AV node. Parasympathetic stimulation reduces the automaticity in the sinoatrial node.Physical exercise increases the venous return to the heart, which results in an increase in cardiac preload.