Health Education Assets Library (HEAL)
 
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TitleDescriptionSubjectCollection
1176 Left anterior fascicular block (LAFB)LAFB is the most common of the intraventricular conduction defects. It is recognized by 1) left axis deviation; 2) rS complexes in II, III, aVF; and 3) small q in I and/or aVL.Knowledge Weavers ECG
1177 Atrial flutter with 2:1 AV conduction: lead V1The arrows point to two flutter waves for each QRS complex. Atrial rate = 280; ventricular rate = 140.Knowledge Weavers ECG
1178 Long QT Interval and Giant Negative T WavesLong QT Interval and Giant Negative T WavesKnowledge Weavers ECG
1179 Frontal plane QRS axis = -15 degreesFrontal plane QRS axis = -15 degreesKnowledge Weavers ECG
1180 Ventricular pacemaker rhythmNote the small pacemaker spikes before the QRS complexes in many of the leads. In addition, the QRS complex in V1 exhibits ventricular ectopic morphology; i.e., there is a slur or notch at the beginning of the S wave, and>60ms delay from onset to QRS to nadir of S wave. This rules against a suprav...Knowledge Weavers ECG
1181 Diffuse anterolateral T wave abnormalitiesDiffuse anterolateral T wave abnormalitiesT Wave AbnormalitiesKnowledge Weavers ECG
1182 Frontal plane QRS axis = -45 degreesFrontal plane QRS axis = -45 degreesKnowledge Weavers ECG
1183 Marked sinus arrhythmia - marquetteMarked sinus arrhythmia - marquetteKnowledge Weavers ECG
1184 Muscle tremor artifact - marquetteMuscle tremor artifact - marquetteKnowledge Weavers ECG
1185 RBBB + LAFB: bifascicular blockRBBB + LAFB: bifascicular blockKnowledge Weavers ECG
1186 ECG of the century: A most unusual 1st degree AV blockOn Day 1, at a heart rate of 103 bpm the P waves are not clearly defined suggesting an accelerated junctional rhythm. However, on Day 2, at a slightly slower heart rate the sinus P wave suddenly appears immediately after the QRS complex. In retrospect, the sinus P wave in Day 1 was found burried i...Knowledge Weavers ECG
1187 RBBB plus mobitz II 2nd degree AV blockThe classic rSR' in V1 is RBBB. Mobitz II 2nd degree AV block is present because the PR intervals are constant. Statistically speaking, the location of the 2nd degree AV block is in the left bundle branch rather than in the AV junction. The last QRS in the top strip is a junctional escape, since...Knowledge Weavers ECG
1188 Left axis deviation: QRS axis = -60 degreesLead aVR is isoelectric; leads II and III are mostly negative. The QRS axis, therefore, is -60 degrees.Knowledge Weavers ECG
1189 QRS axis = +30 degreesLead III is isoelectric; leads I and II are positive. The QRS axis, therefore, is +30 degrees.Knowledge Weavers ECG
1190 Pacemaker failure to sense - marquettePacemaker failure to sense - marquetteKnowledge Weavers ECG
1191 Pacemaker fusion beat - marquettePacemaker fusion beat - marquetteKnowledge Weavers ECG
1192 RAE & RVHRAE & RVHKnowledge Weavers ECG
1193 Type II, 2nd degree sino-atrial blockTwo types of 2nd degree SA block have been described. In type-I, or SA Wenckebach, the P-P interval of the pause is less than 2x the preceding P-P intervals. In type-II SA block the P-P interval of the pause is approximately 2x the normal P-P interval. The distinction between types I and II is no...Knowledge Weavers ECG
1194 Bradycardia-dependent LBBB with carotid sinus massageWhen carotid sinus massage slows the heart rate in this example, the QRS widens into a LBBB. This form of rate-dependent bundle branch block is thought to be due to latent pacemakers in the bundle undergoing phase 4 depolarization; when the sinus impulse enters the partially depolarized bundle, slow...Knowledge Weavers ECG
1195 Atrial tachycardia with 3:2 AV blockIn this rhythm the atrial rate from an ectopic focus is 160 bpm. Atrial activity can be seen on top of T waves, and before QRS's. Careful observation reveals a 3:2 Wenckebach relationship between P waves and QRS's. Atrial tachycardia with block is often a sign of digitalis intoxication.Knowledge Weavers ECG
1196 Ventricular fusion beatsFusion beats occur when two or more activation fronts contribute to the electrical event. These may occur in the atria or in the ventricles. In this example the ventricular fusions are the result of simultaneous activation of the ventricles from two foci, the sinus node and a ventricular ectopic...Knowledge Weavers ECG
1197 Diagram: digitalis effect on rhythm and conductionDiagram: digitalis effect on rhythm and conductionKnowledge Weavers ECG
1198 Calibration signal - marquetteCalibration signal - marquetteKnowledge Weavers ECG
1199 Old inferior MIOld inferior MIKnowledge Weavers ECG
1200 Second degree AV block, type I, with 3:2 conduction ratioThere are two types of 2nd degree AV Block. In this example of Type I or Wenckebach AV block there are 3 P waves for every 2 QRSs; the PR interval increases until a P wave fails to conduct. This is an example of group beating.Knowledge Weavers ECG
1176 - 1200 of 4,589