CLASSIFICATION OF THE AV BLOCKS!

SHARP ECG TEST EXAM (Actual / ) question with verified

CORRECT ANSWERS

Accelerated Junctional Rhythm - ---Answers----regular rhythm, rate 60-100, p waves inverted or occur before during or after QRS, PRI measured if p before QRS <0.12

AV Blocks - ---Answers----AV blocks are identified as a delay or interruption of the electrical impulse conduction beyond the AV node. It is evaluated by measuring the PR interval in ECG traces. THE PR INTERVAL IS THE KEY OF DIFFERENTIATION AND

CLASSIFICATION OF THE AV BLOCKS!

First degree AV block - ---Answers----prolonged PR interval

Second Degree AV block type 1 - ---Answers----AKA Wenckebach Results from a cyclical and progressive conduction delay through the AV junction.Characteristic cyclical lengthening of the PR interval followed by a dropped QRS (or a P wave with no QRS).Irregular Rhythm

Second Degree AV Block Type 2 - ---Answers----intermittent interruptions of AV conduction; *QRS's just drop off with no warning* 1 / 2

Third degree AV block (complete heart block) - ---Answers---- Atrial and ventricular rhythms regular Ventricular rate is 40-60 bpm (AV node origin); < 40 bpm (Purkinje system origin) No relationship between P waves and QRS complexes QRS complex normal (originating in AV node) or wide and bizarre (originating in Purkinje system)

Ventricular tachycardia (V-tach) - ---Answers----A condition in which the heartbeat is quite rapid; if rapid enough, ventricular tachycardia will not allow the heart's chambers to fill with enough blood between beats to produce blood flow sufficient to meet the body's needs.

Ventricular fibrillation (V-fib) - ---Answers----abnormal heart rhythm which results in quivering of ventricles

atrial fibrillation - ---Answers----occurs when the normal rhythmic contractions of the atria are replaced by rapid irregular twitching of the muscular heart wall

Atrial Flutter - ---Answers----irregular beating of the atria; often described as "a-flutter with 2 to 1 block or 3 to 1 block"

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