Health Education Assets Library (HEAL)
 
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TitleDescriptionSubjectCollection
126 Structures of the ketone bodiesThese are the structures of the ketone bodies. Acetoacetate and beta-hydroxybutyrate are important physiological substrates. Acetone is a byproduct, and is not metabolized further. It is excreted in the urine and in expired air.Knowledge Weavers Fatty Acids
127 Calibration signal - marquetteCalibration signal - marquetteKnowledge Weavers ECG
128 Old inferior MIOld inferior MIKnowledge Weavers ECG
129 Second degree AV block, type I, with 3:2 conduction ratioThere are two types of 2nd degree AV Block. In this example of Type I or Wenckebach AV block there are 3 P waves for every 2 QRSs; the PR interval increases until a P wave fails to conduct. This is an example of group beating.Knowledge Weavers ECG
130 Infero-posterior MI with RBBBThis is an unusual RBBB because the initial R wave is taller than the R wave in lead V1. This is the clue for true posterior MI. The tall initial R wave in V1 is a pathologic R wave analagous to the pathologic Q wave of an anterior MI.Knowledge Weavers ECG
131 Right Atrial Enlargement (RAE) & Right Ventricular Hypertrophy (RVH)RAE is recognized by the tall (>2.5mm) P waves in leads II, III, aVF. RVH is likely because of right axis deviation (+100 degrees) and the Qr (or rSR') complexes in V1-2.Knowledge Weavers ECG
132 Frontal plane: accelerated junctional rhythm and inferior MIFrontal plane: accelerated junctional rhythm and inferior MIKnowledge Weavers ECG
133 QRS axis = -30 degreesLead II is isoelectric; I is positive; III is negative. The axis is -30 degrees.Knowledge Weavers ECG
134 Voltage criteria for LVHVoltage criteria for LVHKnowledge Weavers ECG
135 Infero-posterior MIInfero-posterior MIKnowledge Weavers ECG
136 RBBB - marquetteRBBB - marquetteKnowledge Weavers ECG
137 Triacylglycerol structureThe structure of a typical triacylglycerol (triglyceride).Knowledge Weavers Fatty Acids
138 Second degree AV block, type I, with bradycardia-dependent RBBBAn interesting and unusual form of rate-dependent bundle branch block. Normal sinus rhythm at 85 bpm is present with a 3:2 and 2:1 2nd degree AV block. The progressive PR prolongation in the 3:2 block makes this a type-I or Wenckebach block.Long cycles end in RBBB; short cycles have normal QRS dur...Knowledge Weavers ECG
139 Bifascicular block: RBBB + LAFBThis is the most common of the bifascicular blocks. RBBB is most easily recognized in the precordial leads by the rSR' in V1 and the wide S wave in V6 (i.e., terminal QRS forces oriented rightwards and anterior). LAFB is best seen in the frontal plane leads as evidenced by left axis deviation (-50...Knowledge Weavers ECG
140 Frontal plane lead diagramThe six frontal plane leads are illustrated with their respective positive and negative poles.When forced to intersect at a center point, the six leads inscribe a 360 degree circle. The normal frontal plane axis is from -30 degrees to + 90 degrees, shaded in grey. Left axis deviation is from -30 d...Knowledge Weavers ECG
141 Anteroseptal MI: fully evolvedThe QS complexes, resolving ST segment elevation and T wave inversions in V1-2 are evidence for a fully evolved anteroseptal MI. The inverted T waves in V3-5, I, aVL are also probably related to the MI.Knowledge Weavers ECG
142 Atrial parasystoleThe evenly spaced dots indicate ectopic atrial activity from a parasystolic atrial pacemaker. Non-fixed coupled PACs are seen having a common inter-ectopic interval. One of the PACs is nonconducted.Knowledge Weavers ECG
143 Dehydrogenation of fatty acyl CoAFatty acyl CoA is dehydrogenated by FAD in a reaction catalyzed by one of the acyl CoA dehydrogenases. Note that the dehydrogenation occurs between the alpha- and beta-carbons.FADKnowledge Weavers Fatty Acids
144 Ventricular tachycardia - marquetteVentricular tachycardia - marquetteKnowledge Weavers ECG
145 Long QT IintervalLong QT IntervalKnowledge Weavers ECG
146 Reduction of acetoacetateAcetoacetate is reduced by NADH in a reversible reaction catalyzed by beta-hydroxybutyrate dehydrogenase. This reaction is the source of beta-hydroxybutyrate in the blood of individuals with ketosis.Knowledge Weavers Fatty Acids
147 ECG of the century - part II: dual AV pathwaysAn astute cardiology fellow, yours truly, went to the patient's bedside on Day 2 and massaged the right carotid sinus as indicated by the arrow. Four beats later at a slightly slower heart rate the PR interval suddenly normalized suggesting an abrupt change from a slow AV nodal pathway to a fast AV...Knowledge Weavers ECG
148 Left Atrial Enlargement & Nonspecific ST-T Wave AbnormalitiesLAE is best seen in V1 with a prominent negative (posterior) component measuring 1mm wide and 1mm deep. There are also diffuse nonspecific ST-T wave abnormalities which must be correlated with the patient's clinical status. Poor R wave progression in leads V1-V3, another nonspecific finding, is als...Knowledge Weavers ECG
149 Atrial flutter with 3:2 AV conductionThis 12-lead ECG shows a subtle bigeminal rhythm resulting from atrial flutter with a 3:2 AV conduction ratio; RR intervals alternate by a small duration. This is uncommon! The impulses from the atrial flutter conduct through the AV junction in a Wenckebach sequence; for every 3 flutter waves the s...Knowledge Weavers ECG
150 A very subtle 1st degree AV blockWhere are the P waves??? They are hiding in the T waves as indicated by the arrows. How do we know? The PVC unmasked the sinus P wave, and now it is seen in the pause following the PVC. The PR interval is, therefore, about 500 ms.Knowledge Weavers ECG
126 - 150 of 288