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Title | Description | Subject | Collection |
26 |
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Multifocal PVC's - marquette | Multifocal PVC's - marquette | | Knowledge Weavers ECG |
27 |
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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 |
28 |
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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 |
29 |
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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 |
30 |
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2nd degree AV block, type I (Wenckebach) | 2nd degree AV block, type I (Wenckebach) | | Knowledge Weavers ECG |
31 |
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Diagram: stages of acute Q-wave MI | Diagram: stages of acute Q-wave MI | | Knowledge Weavers ECG |
32 |
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Accelerated junctional rhythm | Accelerated junctional rhythm | | Knowledge Weavers ECG |
33 |
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PVC's - marquette | PVC's - marquette | | Knowledge Weavers ECG |
34 |
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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 |
35 |
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Atrial fibrillation with moderate ventricular response - Marquette | Atrial fibrillation with moderate ventricular response - Marquette | | Knowledge Weavers ECG |
36 |
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Ventricular pacing in atrial fibrillation - marquette | Ventricular pacing in atrial fibrillation - marquette | | Knowledge Weavers ECG |
37 |
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Ventricular pacemaker: demand mode functioning | Ventricular pacemaker: demand mode functioning | | Knowledge Weavers ECG |
38 |
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Ventricular escape beat - marquette | Ventricular escape beat - marquette | | Knowledge Weavers ECG |
39 |
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LAFB: frontal plane leads | LAFB: frontal plane leads | | Knowledge Weavers ECG |
40 |
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Old infero-posterior MI | Old infero-posterior MI | | Knowledge Weavers ECG |
41 |
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2nd degree AV block, type I | The 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 Block | Knowledge Weavers ECG |
42 |
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Atrial echos | In this example a typical Wenckebach sequence is interrupted by what looks like a PAC - indicated by red arrows. Atrial echos are more likely, however, because the preceding beat has a long PR interval, a condition that facilitates reentry and echo formation. | | Knowledge Weavers ECG |
43 |
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Anteroseptal MI with RBBB: precordial leads | Anteroseptal MI with RBBB: precordial leads | | Knowledge Weavers ECG |
44 |
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Cardiac conduction system diagram - marquette | Cardiac conduction system diagram - marquette | | Knowledge Weavers ECG |
45 |
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ST segment depression: precordial leads | ST segment depression: precordial leads | | Knowledge Weavers ECG |
46 |
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Idioventricular escape rhythm | Idioventricular escape rhythm | | Knowledge Weavers ECG |
47 |
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Unifocal PVCs - marquette | Unifocal PVCs - marquette | | Knowledge Weavers ECG |
48 |
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Two Wrongs Sometimes Make a Right | The question mark is over a normal looking QRS that occurs during 2:1 AV block with RBBB. Following this QRS a ventricular escape rhythm takes over. The normal looking beat is actually a fusion beat resulting from simultaneous activation of the ventricles; the sinus impulse enters the left ventric... | | Knowledge Weavers ECG |
49 |
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WPW type preexcitation | Note the short PR and the subtle delta wave at the beginning of the QRS complexes. The delta wave represents early activation of the ventricles in the region where the AV bypass tract inserts. The rest of the QRS is derived from the normal activation sequence using the bundle branches. | | Knowledge Weavers ECG |
50 |
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Long QT interval | The QT interval duration is greater than 50% of the RR interval, a good indication that it is prolonged in this patient. Although there are many causes for the long QT, patients with this are at risk for malignant ventricular arrhythmias, syncope, and sudden death. | | Knowledge Weavers ECG |