Health Education Assets Library (HEAL)
 
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TitleDescriptionSubjectCollection
51 ST segment depression: precordial leadsST segment depression: precordial leadsKnowledge Weavers ECG
52 Idioventricular escape rhythmIdioventricular escape rhythmKnowledge Weavers ECG
53 Initiation of beta-oxidationAn acetyl group is transferred from acetyl CoA to the -SH group of the condensing enzyme domain of fatty acyl synthase, forming acetyl-CE. The reaction is catalyzed by the acyltransferase activity of fatty acyl synthase.Knowledge Weavers Fatty Acids
54 Unifocal PVCs - marquetteUnifocal PVCs - marquetteKnowledge Weavers ECG
55 Two Wrongs Sometimes Make a RightThe 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
56 WPW type preexcitationNote 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
57 Long QT intervalThe 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
58 Wandering atrial pacemakerWandering atrial pacemaker is a benign rhythm change where the pacemaker site shifts from the sinus node into the atrial tissues. P-wave morphology varies with the pacemaker site.Knowledge Weavers ECG
59 QRS axis = +60 degreesLead aVL is isoelectric; leads II and III are mostly positive. The QRS axis, therefore, is +60 degrees.Knowledge Weavers ECG
60 Electronic ventricular pacemaker rhythm - marquetteElectronic ventricular pacemaker rhythm - marquetteKnowledge Weavers ECG
61 High lateral wall MI (seen in aVL)High lateral wall MI (seen in aVL)Knowledge Weavers ECG
62 Atrial tachycardia - marquetteAtrial tachycardia - marquetteKnowledge Weavers ECG
63 LVH with StrainLVH with StrainKnowledge Weavers ECG
64 PAC's with RBBB aberrant conductionPAC's are identified by the arrows. Note that the PP interval surrounding the PAC is less than 2x the basic sinus cycle indicating that the sinus node has been reset by the ectopic P wave. The pause after the PAC, therefore, is incomplete.Knowledge Weavers ECG
65 1st degree AV blockThe normal PR interval is 0.12 - 0.20 sec, or 120 -to- 200 ms. 1st degree AV block is defined by PR intervals greater than 200 ms. This may be caused by drugs, such as digoxin; excessive vagal tone; ischemia; or intrinsic disease in the AV junction or bundle branch system.Knowledge Weavers ECG
66 Sore thumbsTwo funny looking premature beats are seen in this rhythm strip. Beat A is preceded by a PAC which distorts the T wave, making this an aberrantly conducted PAC. Beat B is a PVC. The notch on the down slope of the QRS complex clearly identifies this as a PVC and not aberrancy.Knowledge Weavers ECG
67 AV dissociation by defaultIf the sinus node slows too much a junctional escape pacemaker may take over as indicated by arrows. AV dissociation is incomplete, since the sinus node speeds up and recaptures the entricles.Knowledge Weavers ECG
68 Fatty acid metabolism -- schematic overviewFatty acids are taken up by cells, where thy may serve as precursors in the synthesis of other compounds, as fuels for energy production, and as substrates for ketone body synthesis. Ketones bodies may then be exported to other tissues, where they can be used for energy production.BiosynthesisKnowledge Weavers Fatty Acids
69 Atrial tachycardia with 2:1 AV block: a manifestation of digitalis intoxicationAtrial tachycardia with 2:1 AV block: a manifestation of digitalis intoxicationKnowledge Weavers ECG
70 Condensation of an acyl group with a malonyl groupThe acetyl group displaces the carboxyl of the malonyl group, forming a beta-ketoacyl group. This reaction is catalyzed by beta-ketoacyl Acyl Carrier Peptide synthase. The carboxyl released in the form of bicarbonate regenerates the bicarbonate used earlier in the acetyl CoA carboxylase reaction.Knowledge Weavers Fatty Acids
71 Accelerated junctional rhythm - marquetteAccelerated junctional rhythm - marquetteKnowledge Weavers ECG
72 First degree AV block - marquetteFirst degree AV block - marquetteKnowledge Weavers ECG
73 AV sequential pacemaker - marquette(Summary)Knowledge Weavers ECG
74 Essential features of a fatty acidThe essential features of a fatty acid are a long hydrocarbon chain terminating in a carboxylic acid group.Knowledge Weavers Fatty Acids
75 Postero-lateral MI: Fully EvolvedThe true posterior MI is recognized by pathologic R waves in leads V1-2. These are the posterior equivalent of pathologic Q waves (seen from the perspective of the anterior leads). Tall T waves in these same leads are the posterior equivalent of inverted T waves in this fully evolved MI. The loss o...Knowledge Weavers ECG
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