Health Education Assets Library (HEAL)
 
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TitleDescriptionSubjectCollection
26 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
27 Right axis deviation: QRS axis = +130 degreesLead aVR is almost isoelectric; lead I is mostly negative, and lead III is very positive. The QRS axis, therefore, is +130 degrees. Note that the slightly more positive AVR moves the axis slightly beyond +120 degrees; i.e., closer to the + pole of the aVR lead.Knowledge Weavers ECG
28 Extensive anterior/anterolateral MI: precordial leadsExtensive anterior/anterolateral MI: precordial leadsKnowledge Weavers ECG
29 LVH: strain pattern + left atrial enlargementLVH: strain pattern + left atrial enlargementKnowledge Weavers ECG
30 Ventricular asystole - marquetteVentricular asystole - marquetteKnowledge Weavers ECG
31 Multifocal PVC's - marquetteMultifocal PVC's - marquetteKnowledge Weavers ECG
32 Atrial flutter with 2:1 AV conductionIn this example of atrial flutter with 2:1 AV conduction the flutter waves are very hard to see. Atrial flutter with 2:1 block must be considered, however, because the heart rate is about 150 bpm. A careful look at V1 shows the two flutter waves for each QRS complex complex. One flutter wave imme...Knowledge Weavers ECG
33 Ventricular parasystoleIn ventricular parasystole, non-fixed coupled PVC's occur at a common inter-ectopic interval. Fusion beats, indicated by arrows, are often seen. Fusions occur when the sinus impulse entering the ventricles find the ventricles already partially depolarized by the parasystolic focus.Knowledge Weavers ECG
34 Atrial flutter with 2:1 and 4:1 conduction and rate dependent LBBBIn this example of atrial flutter with variable AV conduction, the faster rates are associated with rate-related LBBB. Don't confuse this for ventricular tachycardia.Knowledge Weavers ECG
35 Propionyl CoA carboxylase reactionPropionyl CoA is metabolized by a process that first converts it to D-methylmalonyl CoA. The reaction is catalyzed by propionyl CoA carboxylase,and requires energy in the form of ATP.BiosynthesisKnowledge Weavers Fatty Acids
36 2nd degree AV block, type I (Wenckebach)2nd degree AV block, type I (Wenckebach)Knowledge Weavers ECG
37 Diagram: stages of acute Q-wave MIDiagram: stages of acute Q-wave MIKnowledge Weavers ECG
38 Accelerated junctional rhythmAccelerated junctional rhythmKnowledge Weavers ECG
39 PVC's - marquettePVC's - marquetteKnowledge Weavers ECG
40 Linoleic acid structureLinoleic acid is a typical polyunsaturated fatty acid.Knowledge Weavers Fatty Acids
41 2nd degree AV block with junctional escapes and capturesSecond degree AV block is present; conducted beats are identified by those QRS's that terminate shorter cycles than the junctional escape cycle; i.e., the 3rd and probably the 4th QRS's are captures; the other QRS's are junctional escapes.Knowledge Weavers ECG
42 Atrial fibrillation with moderate ventricular response - MarquetteAtrial fibrillation with moderate ventricular response - MarquetteKnowledge Weavers ECG
43 Ventricular pacing in atrial fibrillation - marquetteVentricular pacing in atrial fibrillation - marquetteKnowledge Weavers ECG
44 Ventricular pacemaker: demand mode functioningVentricular pacemaker: demand mode functioningKnowledge Weavers ECG
45 Ventricular escape beat - marquetteVentricular escape beat - marquetteKnowledge Weavers ECG
46 LAFB: frontal plane leadsLAFB: frontal plane leadsKnowledge Weavers ECG
47 Old infero-posterior MIOld infero-posterior MIKnowledge Weavers ECG
48 Reduction of a 2,4-dienoyl CoAThe reduction of 2,4-dienoyl CoA by NADPH is a step in the oxidation of polyunsaturated fatty acids. It is ironic that a reduction reaction is a required step in a process that is oxidative.Knowledge Weavers Fatty Acids
49 Stearic, oleic and linoleic acid structuresStearic, oleic and linoleic acid structuresKnowledge Weavers Fatty Acids
50 2nd degree AV block, type IThe 3 rules of classic AV Wenckebach are: 1. decreasing RR intervals until pause; 2. the pause is less than preceding 2 RR intervals; and 3. the RR interval after the pause is greater than the RR interval just prior to pause. Unfortunately, there are many examples of atypical forms of Wenckebach wh...Wenckebach AV BlockKnowledge Weavers ECG
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