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Discourses on EKG. Ali Kazemi Saeid. Determination the site of occlusion in the coronary artery. LCX. RCA. Proximal of RCA. Distal of RCA. LCX. LAD Occlusion. Proximal to first septal branch and first diagonal Distal to first septal, proximal to first diagonal - PowerPoint PPT Presentation

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Page 1: Discourses on EKG
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Discourses on EKG

Ali Kazemi Saeid

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Determination the site of occlusion in the

coronary artery

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RCA LCX

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Proximal of RCA

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Distal of RCA

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LCX

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LAD Occlusion

Proximal to first septal branch and first diagonal

Distal to first septal, proximal to first diagonal

Distal to first diagonal, proximal to first septal

Distal LAD

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Proximal to first septal and first diagonal

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ST deviation vector points to the base of the heart, causing:

ST elevation in leads aVR and aVL ST depression in leads II, III, aVF ST elevation in lead V1(>2mm) and

leads V2 to V4 ST isoelectric or depressed in leads

V5 and V6Note: Acquired intra-Hissal or RBBB

may occur.

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Distal to first septal, proximal to first diagonal

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ST deviation vector points to lead aVL, causing:

ST elevation in leads I and aVL ST depression in lead III (lead II is isoelectric)

ST elevation in leads V2 to V6 but not in lead V1

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Distal to first diagonal , proximal to first septal

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Distal LAD occlusion

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ST depression aVR ST elevation in inferior leads,

highest in II ST elevation in leads V3 to V6

ST deviation vector points apically toward lead III, causing:

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Left main occlusion

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ST deviation vector points to lead aVR

ST elevation in lead aVR ST elevation in lead V1( lower than

that of lead aVR) ST depression in lead II,aVF (basal

ischemia) ST depression in the precordial

leads to the left of V2 (posterior ischemia)

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