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TitleDescriptionSubjectCollection
126 Electronic atrial pacing - marquetteElectronic atrial pacing - marquetteKnowledge Weavers ECG
127 Normal sinus rhythm - marquetteNormal sinus rhythm - marquetteKnowledge Weavers ECG
128 Left ventricular PVC'sIn lead V1, these PVC's are positive or anterior in direction indicating probable LV origin with late activation of the right ventricle. The arrow points to the notch on the downstroke of the PVC making its morphology highly unlikely to be an aberrantly conducted supraventricular beat.Knowledge Weavers ECG
129 Junctional tachycardia with exit block: a manifestation of digitalis intoxicationTheladder diagramsays it all: the atria are fibrillating; there is complete heart block in the AV junction; a junctional tachycardia focus is firing at about 130 bpm, but not all junctional impulses reach the ventricles due to 2nd degree exit block.Knowledge Weavers ECG
130 Contraception for women in their later yearsContraception for women in their later reproductive years.Knowledge Weavers Human Reproduction
131 Frontal plane QRS axis = +90 degrees1) Lead I is isoelectric; 2) perpendiculars to lead I are +90 and -90 degrees; 3) leads II, III, aVF are positive; 4) therefore, the axis must be +90 degrees.Knowledge Weavers ECG
132 Electrical and mechanical events diagram - marquetteElectrical and mechanical events diagram - marquetteKnowledge Weavers ECG
133 Anteroseptal MI, fully evolved: precordial leadsAnteroseptal MI, fully evolved: precordial leadsKnowledge Weavers ECG
134 Left atrial enlargement: leads II and V1Left atrial enlargement: leads II and V1Knowledge Weavers ECG
135 Fully evolved inferior MI: frontal planeFully evolved inferior MI: frontal planeKnowledge Weavers ECG
136 Frontal plane QRS axis = -75 degreesFrontal plane QRS axis = -75 degreesKnowledge Weavers ECG
137 methylmalonyl CoA mutase reactionIn the metabolism of propionyl CoA L-methylmalonyl CoA is converted to succinate by methylmalonyl CoA mutase. Succinate can then be metabolized throgh the tricarboxylic acid cycle.Knowledge Weavers Fatty Acids
138 Supernormal conduction: 2nd degree AV block with rare captures; accelerated ventricular rhythmThis complicated rhythm strip illustrates 'supernormal' conduction... a situation where conduction is better than expected. The ladder diagram shows that the accelerated ventricular rhythm prevents most of the sinus impulses from reaching the ventricles. Only appropriately timed sinus impulses rea...Knowledge Weavers ECG
139 Complete AV block, junctional escape rhythm, and ventriculophasic sinus arrhythmiaComplete AV block is seen as evidenced by the AV dissociation. A junctional escape rhythm sets the ventricular rate at 45 bpm. The PP intervals vary because of ventriculophasic sinus arrhythmia; this is defined when the PP interval that includes a QRS is shorter than a PP interval that excludes a ...Knowledge Weavers ECG
140 Junctional parasystole and pseudo-AV blockThis complicated rhythm strip shows normal sinus rhythm and a competing junctional parasystolic focus. Solid circles indicate junctional premature beats from the parasystolic focus. Open circles indicate non-conducted junctional prematures; the first open circle is a nonconducted junctional prematur...Knowledge Weavers ECG
141 Mammalian fatty acyl synthase dimerThis schematic diagram is intended to show the sequence of enzyme activities in the two subunits of a mammalian fatty acyl synthase dimer. It is not intended to imply anything about the detailed spatial relationships of the activities.Coenzyme A SynthetasesKnowledge Weavers Fatty Acids
142 Premature junctional complexes with retrograde P wavesThe ladder diagram illustrates the PJC with retrograde atrial captureKnowledge Weavers ECG
143 Left Atrial Abnormality & 1st Degree AV Block: Leads II and V1Left Atrial Abnormality & 1st Degree AV Block: Leads II and V1Knowledge Weavers ECG
144 Right Axis Deviation & RAE (P pulmonale): Leads I, II, IIIRight Axis Deviation & RAE (P pulmonale): Leads I, II, IIIKnowledge Weavers ECG
145 Ventricular bigeminy - marquetteVentricular bigeminy - marquetteKnowledge Weavers ECG
146 Hydration of an enoyl CoAHydration of the double bond is catalyzed by enoyl CoA hydratase. The product is an L-3-hydroxyacyl CoA. This reaction is a step in the beta-oxidation of fatty acids.Knowledge Weavers Fatty Acids
147 LBBB and 2nd degree AV block, mobitz type IMobitz II 2nd degree AV block is usually a sign of bilateral bundle branch disease. One of the two bundle branches should be completely blocked; in this example the left bundle is blocked. The nonconducted sinus P waves are most likely blocked in the right bundle which exhibits 2nd degree block. ...Knowledge Weavers ECG
148 Infero-posterior MI&RBBBDeep Q waves in II, III, aVF plus tall R waves in V1-2 are evidence for this infero-posterior MI. The wide QRS (>0.12s) and RR' complex in V1 are evidence for RBBB. Any time RBBB has an initial R in V1 equal to or greater than the R', true posterior MI must be considered. Q waves in V5-6 suggest a...Knowledge Weavers ECG
149 Extensive anterior/anterolateral MI: recentSignificant 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
150 Nonconducted PAC's slowing the heart rateConsecutive 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
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