CARDIAC DYSRTHMIAS EXAM 2024 PART 2.

CARDIAC DYSRHYTHMIAS - ANSWER - are disorders of the formation or
conduction (or both) of the electrical impulse within the heart.

P wave - ANSWER - the electrical impulse starting in the SA node and spreading
through the atria; atrial depolarization.

QRS complex - ANSWER - represents ventricular depolarization.

T wave - ANSWER - represents ventricular repolarization.

PR interval - ANSWER - the time needed for sinus node stimulation, atrial
depolarization, and conduction through the AV node before ventricular
depolarization.

RR interval - ANSWER - is used to determine the ventricular rate and rhythm.

SA NODE - ANSWER 60-100 bpm

AV NODE - ANSWER 40-60 bpm

BUNDLE OF HIS - ANSWER 20-40 bpm

RIGHT & LEFT BUNDLE BRANCH - ANSWER 20-40 bpm

PURKINJE FIBERS - ANSWER 20-40 bpm

Normal sinus rhythm
Sinus Bradycardia
Sinus Tachycardia
Ventricular Tachycardia
Ventricular Fibrillation
Premature Ventricular Contractions - ANSWER Types:

NORMAL SINUS RHYTHM - ANSWER -Rhythm originates in the SA node
-(usually indicates a good cardiovascular health)
Rhythm: REGULAR
P wave: PRESENT/UPRIGHT/BEFORE QRS
PR interval:
normal 0.12s - 0.20s
3-5 small boxes
QRS complex:
normal 0.6s - 0.10s
1.5-2.5 small boxes Heart Rate: 60 - 100 bpm

SINUS BRADYCARDIA - ANSWER some causes:
include lower metabolic needs
vagal stimulation
medications
Rhythm: REGULAR but SLOW
P wave: PRESENT/UPRIGHT/BEFORE QRS