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Title | Description | Subject | Collection |
226 |
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Atrial flutter with variable AV block and rate-dependent LBBB | The basic rhythm is atrial flutter with variable AV block. When 2:1 conduction ratios occur there is a rate-dependent LBBB. Don't be fooled by the wide QRS tachycardia on the bottom strip. It's not ventricular tachycardia, but atrial flutter with 2:1 conduction and LBBB. Lidocaine is not needed ... | | Knowledge Weavers ECG |
227 |
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three fates of PAC's | As illustrated, PAC's can have three fates: PAC-1enters the ventricles and encounters no conduction delays, therefore causing a narrow QRS; PAC-2 occurs a little earlier and can't get through the AV junction, therefore beingnonconducted; PAC-3 seen inlead V1 makes it into the ventricles but encounte... | | Knowledge Weavers ECG |
228 |
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Ventricular tachycardia with AV dissociation, captures, and fusions | Approximately 50 percent of ventricular tachycardias are associated with AV dissociation. In these cases atrial impulses can enter the ventricles and either fuse with a ventricular ectopic beat or completely capture the ventricles. This ladder diagram illustrates these events. | | Knowledge Weavers ECG |
229 |
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Frontal plane QRS axis = +75 degrees | Since 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 |
230 |
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Right axis deviation: QRS axis = +130 degrees | Lead 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 |
231 |
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Extensive anterior/anterolateral MI: precordial leads | Extensive anterior/anterolateral MI: precordial leads | | Knowledge Weavers ECG |
232 |
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LVH: strain pattern + left atrial enlargement | LVH: strain pattern + left atrial enlargement | | Knowledge Weavers ECG |
233 |
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Ventricular asystole - marquette | Ventricular asystole - marquette | | Knowledge Weavers ECG |
234 |
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Multifocal PVC's - marquette | Multifocal PVC's - marquette | | Knowledge Weavers ECG |
235 |
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Atrial flutter with 2:1 AV conduction | In 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 |
236 |
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Ventricular parasystole | In 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 |
237 |
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Atrial flutter with 2:1 and 4:1 conduction and rate dependent LBBB | In 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 |
238 |
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Propionyl CoA carboxylase reaction | Propionyl 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. | Biosynthesis | Knowledge Weavers Fatty Acids |
239 |
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2nd degree AV block, type I (Wenckebach) | 2nd degree AV block, type I (Wenckebach) | | Knowledge Weavers ECG |
240 |
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Diagram: stages of acute Q-wave MI | Diagram: stages of acute Q-wave MI | | Knowledge Weavers ECG |
241 |
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Accelerated junctional rhythm | Accelerated junctional rhythm | | Knowledge Weavers ECG |
242 |
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PVC's - marquette | PVC's - marquette | | Knowledge Weavers ECG |
243 |
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Linoleic acid structure | Linoleic acid is a typical polyunsaturated fatty acid. | | Knowledge Weavers Fatty Acids |
244 |
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2nd degree AV block with junctional escapes and captures | Second 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 |
245 |
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Atrial fibrillation with moderate ventricular response - Marquette | Atrial fibrillation with moderate ventricular response - Marquette | | Knowledge Weavers ECG |
246 |
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Ventricular pacing in atrial fibrillation - marquette | Ventricular pacing in atrial fibrillation - marquette | | Knowledge Weavers ECG |
247 |
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Ventricular pacemaker: demand mode functioning | Ventricular pacemaker: demand mode functioning | | Knowledge Weavers ECG |
248 |
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Ventricular escape beat - marquette | Ventricular escape beat - marquette | | Knowledge Weavers ECG |
249 |
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LAFB: frontal plane leads | LAFB: frontal plane leads | | Knowledge Weavers ECG |
250 |
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Old infero-posterior MI | Old infero-posterior MI | | Knowledge Weavers ECG |