By Philip Podrid, Rajeev Malhotra, Rahul Kakkar, Peter Noseworthy

The 6th and ultimate print quantity within the Podrid's Real-World ECGs sequence provides 124 case reviews overlaying: pacemakers, ECG recording concerns, medicinal drugs, electrolytes, congenital stipulations, and abnormalities.

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Sample text

A pacing stimulus, and 20 mm S wave in lead V2, meeting criteria for left ventricular artifact, or spike (+) is seen before each P wave ( * ), indicating that hypertrophy (ie, > 20 mm in any limb lead and SV2 + RV5 ≥ 35 mm. this is atrial pacing. Since the P wave is initiated by a pacemaker, the There is also slight J point and ST-segment elevation in lead V2 (↓) that P-wave axis and morphology may be abnormal, related to the location is early repolarization. of the atrial lead. Abnormalities of the right or left atrium cannot be established, as the P wave is abnormal due to its initiation by a There is 100% atrial capture and hence the pacemaker function appears pacemaker stimulus and hence an abnormal atrial activation sequence.

08 sec). The axis is normal between 0° and +90° (positive QR S underlying sinus bradycardia since she is atrial pacing at a rate of only complex in leads I and aV F). The QT/ QT c intervals are normal 50 bpm and here spontaneous sinus rate must be less than this. Hence (440/400 msec). The QR S morphology is normal, but the R waves an atrial pacemaker is an appropriate therapy in this situation and there have an increased amplitude ( [ ), ie, 25 mm in lead II, 28 mm in V5 is no need for ventricular pacing.

Of the paced P wave. The finding of disease of both bundles when associated with symptoms meets class I criteria for ventricular pacemaker (answer C). 24 sec) as a result of a first-degree block (episodic lightheadedness). AV block. 16 sec), and it has a morphology of a typical right bundle branch block ( R BBB ) (broad In the setting of chronic bifascicular or trifascicular block, the class I R wave in V1 [→] and broad S waves in leads I and V5–V6) [←]). The indications for permanent pacing include: (1) intermittent complete axis is rightward between +90° and +180° (negative QRS complex in heart block; (2) type II second-degree AV block; and (3) alternating lead I and positive in lead aVF).

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