151 - 175 of 288
Number of results to display per page
TitleDescriptionSubjectCollection
151 three fates of PAC's: 1. normal conduction; 2. aberrant conduction; 3. non-conductionthree fates of PAC's: 1. normal conduction; 2. aberrant conduction; 3. non-conductionKnowledge Weavers ECG
152 QRS axis = 0 degreesLead aVF is isoelectric; lead I is positive; therefore, the QRS axis is 0 degrees.Knowledge Weavers ECG
153 Ventricular fusion beat - marquetteVentricular fusion beat - marquetteKnowledge Weavers ECG
154 60 cycle artifact - marquette60 cycle artifact - marquetteKnowledge Weavers ECG
155 LBBB: precordial leadsLBBB: precordial leadsKnowledge Weavers ECG
156 Not all sore thumbs are ventricular in originPACs 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
157 Acute infero-postero-lateral MIHyperacute 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
158 Ventricular Pacemaker Rhythm: V1-3Note 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
159 Inferior MI: fully evolvedSignificant 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
160 Complete AV block (3rd degree) with junctional rhythmComplete AV block (3rd degree) with junctional rhythmKnowledge Weavers ECG
161 QRS axis = +90 degreesLead I is isoelectric; II and III are positive; the axis is +90 degrees.Knowledge Weavers ECG
162 Left bundle branch block - marquetteLeft bundle branch block - marquetteKnowledge Weavers ECG
163 Junctional escape rhythmJunctional escape rhythmKnowledge Weavers ECG
164 Acetyl CoA structureAcetyl CoA Structure. The thioester bond linking the acetyl group to CoA is ahigh energybond.Knowledge Weavers Fatty Acids
165 Diagram: AV nodal reentrant tachycardiaThe 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
166 Atrial parasystoleIn 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
167 Use of greek letters to designate carbons in fatty acidsThe 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...NomenclatureKnowledge Weavers Fatty Acids
168 Atrial flutter with 2:1 conduction: leads II, III, V1Atrial flutter with 2:1 conduction: leads II, III, V1Knowledge Weavers ECG
169 Pacemaker lead wire placement diagram - marquettePacemaker lead wire placement diagram - marquetteKnowledge Weavers ECG
170 Frontal and horizontal plane lead diagramFrontal and horizontal plane lead diagramKnowledge Weavers ECG
171 ST segment diagram - marquetteST segment diagram - marquetteKnowledge Weavers ECG
172 Atrial bigeminy - marquetteAtrial bigeminy - marquetteKnowledge Weavers ECG
173 Right Bundle Branch BlockRight Bundle Branch BlockKnowledge Weavers ECG
174 2nd degree AV block, type I, with accelerated junctional escapes and a ladder diagramThe ladder diagram illustrates a Wenckebach type AV block by the increasing PR intervals before the blocked P wave. After the blocked P wave, however, a rev-ed up junctional pacemaker terminates the pause. Note that the junctional beats have a slightly different QRS morphology from the sinus beats...Knowledge Weavers ECG
175 Atrial tachycardia with exit block and AV blockThe ectopic P waves, easily seen in this example,occur in groups, separated by short pauses. This is likely due to an exit block just distal to the atrial pacemaker. Because not all of the P waves make it to the ventricles, there is also 2nd degree AV block. Therefore, two levels of block are pre...Knowledge Weavers ECG
151 - 175 of 288