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Title | Description | Subject | Collection |
151 |
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Extensive anterior/anterolateral MI: recent | Significant 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 |
152 |
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Nonconducted PAC's slowing the heart rate | Consecutive nonconducted PAC's, indicated by arrows, can significantly slow the heart rate. Note the distortion of the ST-T waves caused by the PAC. A hint in recognizing nonconducted PAC's is to find conducted PAC's in the same rhythm strip. | | Knowledge Weavers ECG |
153 |
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three fates of PAC's: 1. normal conduction; 2. aberrant conduction; 3. non-conduction | three fates of PAC's: 1. normal conduction; 2. aberrant conduction; 3. non-conduction | | Knowledge Weavers ECG |
154 |
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QRS axis = 0 degrees | Lead aVF is isoelectric; lead I is positive; therefore, the QRS axis is 0 degrees. | | Knowledge Weavers ECG |
155 |
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Ventricular fusion beat - marquette | Ventricular fusion beat - marquette | | Knowledge Weavers ECG |
156 |
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60 cycle artifact - marquette | 60 cycle artifact - marquette | | Knowledge Weavers ECG |
157 |
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LBBB: precordial leads | LBBB: precordial leads | | Knowledge Weavers ECG |
158 |
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Not all sore thumbs are ventricular in origin | PACs have three fates: normal conduction into ventricles, aberrant conduction in ventricles due to bundle branch or fascicular block, and non-conduction due to block in AV junction. In this example PAC 1 is normally conducted and PAC 2 is conducted with RBBB aberration. The longer preceding cycle ... | | Knowledge Weavers ECG |
159 |
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Acute infero-postero-lateral MI | Hyperacute ST segment elevation is seen in leads II, III, aVF (inferior location) and in leads V4-6 (apical lateral wall location). Hyperacute ST depression is seen in leads V1-2 (an expression of posterior wall injury). in addition there are reciprocal ST segment depression changes in leads I an... | | Knowledge Weavers ECG |
160 |
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Ventricular Pacemaker Rhythm: V1-3 | Note the small pacemaker spikes before the QRS complexes. In addition, the QRS complex in V1-3 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 supraventricular rhythm wi... | | Knowledge Weavers ECG |
161 |
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Inferior MI: fully evolved | Significant pathologic Q-waves are seen in leads II, III, aVF along with resolving ST segment elevation and symmetrical T wave inversion. This is a classic inferior MI. | | Knowledge Weavers ECG |
162 |
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Complete AV block (3rd degree) with junctional rhythm | Complete AV block (3rd degree) with junctional rhythm | | Knowledge Weavers ECG |
163 |
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QRS axis = +90 degrees | Lead I is isoelectric; II and III are positive; the axis is +90 degrees. | | Knowledge Weavers ECG |
164 |
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Left bundle branch block - marquette | Left bundle branch block - marquette | | Knowledge Weavers ECG |
165 |
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Junctional escape rhythm | Junctional escape rhythm | | Knowledge Weavers ECG |
166 |
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Acetyl CoA structure | Acetyl CoA Structure. The thioester bond linking the acetyl group to CoA is ahigh energybond. | | Knowledge Weavers Fatty Acids |
167 |
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Diagram: AV nodal reentrant tachycardia | The AV node often has dual pathways; in this diagram the alpha pathway is fast, but has a long refractory period; the beta pathway is conducts more slowly, but recovers faster.In sinus rhythm the faster alpha pathway is used and accounts for the normal PR interval. When a PAC occurs, however, the i... | | Knowledge Weavers ECG |
168 |
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Atrial parasystole | In atrial parasystole non-fixed coupled PACs, shown by arrows, occur at a common inter-ectopic interval or at multiples of this interval. Atrial fusions, not shown here, may also occur when the PAC occurs in close temporal proximity to the sinus impulse. | | Knowledge Weavers ECG |
169 |
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Use of greek letters to designate carbons in fatty acids | The carbon next to the -COOH group is the alpha carbon; the next one is the beta carbon, and so forth. The carbon most distant from the -COOH group is designated omega. Carbons close to the omega carbon may be designated in relation to it. E.g., the third carbon from the end is omega - 3, and the... | Nomenclature | Knowledge Weavers Fatty Acids |
170 |
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Atrial flutter with 2:1 conduction: leads II, III, V1 | Atrial flutter with 2:1 conduction: leads II, III, V1 | | Knowledge Weavers ECG |
171 |
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Pacemaker lead wire placement diagram - marquette | Pacemaker lead wire placement diagram - marquette | | Knowledge Weavers ECG |
172 |
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Frontal and horizontal plane lead diagram | Frontal and horizontal plane lead diagram | | Knowledge Weavers ECG |
173 |
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ST segment diagram - marquette | ST segment diagram - marquette | | Knowledge Weavers ECG |
174 |
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Atrial bigeminy - marquette | Atrial bigeminy - marquette | | Knowledge Weavers ECG |
175 |
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Right Bundle Branch Block | Right Bundle Branch Block | | Knowledge Weavers ECG |