Health Education Assets Library (HEAL)
 
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TitleDescriptionSubjectCollection
76 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
77 Electrical and mechanical events diagram - marquetteElectrical and mechanical events diagram - marquetteKnowledge Weavers ECG
78 Electronic atrial pacing - marquetteElectronic atrial pacing - marquetteKnowledge Weavers ECG
79 Electronic ventricular pacemaker rhythm - marquetteElectronic ventricular pacemaker rhythm - marquetteKnowledge Weavers ECG
80 Extensive anterior/anterolateral MI: precordial leadsExtensive anterior/anterolateral MI: precordial leadsKnowledge Weavers ECG
81 Extensive anterior/anterolateral MI: recentSignificant pathologic Q-waves (V2-6, I, aVL) plus marked ST segment elevation are evidence for this large anterior/anterolateral MI. The exact age of the infarction cannot be determined without clinical correlation and previous ECGs, but this is likely a recent MI.Knowledge Weavers ECG
82 First degree AV block - marquetteFirst degree AV block - marquetteKnowledge Weavers ECG
83 Frontal and horizontal plane lead diagramFrontal and horizontal plane lead diagramKnowledge Weavers ECG
84 Frontal plane lead diagramThe six frontal plane leads are illustrated with their respective positive and negative poles.When forced to intersect at a center point, the six leads inscribe a 360 degree circle. The normal frontal plane axis is from -30 degrees to + 90 degrees, shaded in grey. Left axis deviation is from -30 d...Knowledge Weavers ECG
85 Frontal plane QRS axis = +15 degreesFrontal plane QRS axis = +15 degreesKnowledge Weavers ECG
86 Frontal plane QRS axis = +150 degrees (RAD)This is an unusual right axis deviation (RAD). Lead I is negative, which usually means RAD. Lead II is the isoelectric lead, which almost always means -30 degrees; but in this example the axis is 180 degrees away from -30, or +150 degrees.Knowledge Weavers ECG
87 Frontal plane QRS axis = +30 degreesFrontal plane QRS axis = +30 degreesKnowledge Weavers ECG
88 Frontal plane QRS axis = +50 degrees1) lead aVL is the smallest QRS and closest to being the isoelectric lead; 2) perpendiculars to aVL are +60 and -120 degrees; 3) lead I is positive; 4) therefore, the axis is closest to being +60 degrees. Because aVL is actually slightly positive, the axis is only about +50 degrees (i.e., slightly ...Knowledge Weavers ECG
89 Frontal plane QRS axis = +75 degreesSince there is no isoelectric lead in this ECG, the two closest leads are I and aVL. If I were isoelectric, the axis would be +90 degrees; if aVL were isoelectric, the axis would be +60 degrees. A nice compromize is +75 degrees. (The two closest leads are always 30 degrees apart.)Knowledge Weavers ECG
90 Frontal plane QRS axis = +90 degrees1) Lead I is isoelectric; 2) perpendiculars to lead I are +90 and -90 degrees; 3) leads II, III, aVF are positive; 4) therefore, the axis must be +90 degrees.Knowledge Weavers ECG
91 Frontal plane QRS axis = -15 degreesFrontal plane QRS axis = -15 degreesKnowledge Weavers ECG
92 Frontal plane QRS axis = -45 degreesFrontal plane QRS axis = -45 degreesKnowledge Weavers ECG
93 Frontal plane QRS axis = -45 degreesFrontal plane QRS axis = -45 degreesKnowledge Weavers ECG
94 Frontal plane QRS axis = -75 degreesFrontal plane QRS axis = -75 degreesKnowledge Weavers ECG
95 Frontal plane QRS axis = 0 degreesFrontal plane QRS axis = 0 degreesKnowledge Weavers ECG
96 Frontal plane QRS axis = 90 degreesFrontal plane QRS axis = 90 degreesKnowledge Weavers ECG
97 Frontal plane: accelerated junctional rhythm and inferior MIFrontal plane: accelerated junctional rhythm and inferior MIKnowledge Weavers ECG
98 Fully evolved inferior MI: frontal planeFully evolved inferior MI: frontal planeKnowledge Weavers ECG
99 Giant TU fusion wavesTU fusion waves are often seen in long QT syndromes. The differential diagnosis of this ECG abnormality includes electrolyte abnormalities -hypokalemia, CNS disease, e.g., subarachnoid hemorrhage; hereditary long QT syndromes, and drugs such as quinidine.Knowledge Weavers ECG
100 High lateral wall MI (seen in aVL)High lateral wall MI (seen in aVL)Knowledge Weavers ECG
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