ECG Strips Review Course 2023.

ECG Strips Review Course 2023.Normal Sinus Rhythm - ANSWER Regular rhythm normal rate P wave for every QRS; all P waves similar in size/shape All QRS complexes similar in size and shape Normal PR and QT intervals Normal (upright and round) T waves Asystole - ANSWER No atrial or ventricular rate or rhythm No discernible P waves, QRS complexes, or T waves Atrial Fibrillation - ANSWER Atrial and ventricular rhythms grossly irregular Atrial rate 400 bpm; ventricular rate varies No P waves; replaced by fine fibrillatory waves First degree AV block - ANSWER Regular rhythm PR interval 0.20 seconds P wave preceding each QRS complex; QRS complex normal Atrial Tachycardia - ANSWER Rhythm regular if block is constant; irregular if not Rate 150-250 bpm P waves regular but hidden in preceding T wave; precede QRS complex Usually has sudden onset and termination Atrial Flutter - ANSWER Atrial rhythm regular; ventricular rhythm variable Atrial rate 250-400 bpm; ventricular rate depends on degree of AV block Sawtooth P wave configuration (F waves) Premature ventricular contractions - ANSWER Underlying rhythm regular P waves absent occasionally QRS premature, usually followed by compensatory pause QRS complex wide & bizarre, duration 0.12 s Premature QRS complexes occurring singly, in pairs, or in threes; possibly unifocal or multifocal Most ominous when clustered, multifocal, and with R wave on T pattern Premature junctional contractions - ANSWER Rhythm irregular P waves before, hidden in, or after QRS complexes; inverted if visible PR interval 0.12 s, if P wave precedes QRS complex QRS configuration & duration normal Premature atrial contractions - ANSWER Premature, abnormal P waves (differ in configuration from normal P waves) QRS complexes after P waves usually P wave often buried or identified in preceding T wave