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19 Cards in this Set
- Front
- Back
Infarction in ventricles can often be fatal. Why?
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Nearby Hypoxic Ventricular foci can produce serious ventricular arrrhythmias.
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Ischemia is characterized on an EKG by an inverted and symmetrical (blank).
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T wave
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Acute myocardial injury is denoted on an EKG by ST segment (blank)
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elevation
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Persistent ST segment elevation in the precordial leads is related to what condition?
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Ventricular Aneurysm
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ST segment elevation along with (blank) can denote severity of the infarction.
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Q waves (no Qs usually less severe)
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Describe the Effect of Pericarditis on the ST segment.
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Elevation of ST that is flat or slightly concave.
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Flat ST depression can be seen in (blank location) infarction
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subendocardial
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Significant Q waves (0.04s, 1mm, or 1/3 QRS) indicate (blank).
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necrosis
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Describe where best to appreciate Q waves in Anterior, Lateral & Inferior Infarcts.
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Anterior - V1-V4;
Lateral - I, AVL; Inferior - II, III, AVF |
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What would you see in V1-V2 with Acute Anterior Infarction?
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ST elevation with Significant Q waves
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What would you see in V1-V2 with Acute Posterior Infarction?
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Large R wave with ST depression (note that this is the opposite of Acute Anterior).
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Why does LBBB complicate infarction diagnosis on EKG?
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Delay causes Q waves from the Left to fall within the middle of the QRS complex and may not be detected.
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Describe the coronary vessels responsible in Anterior, Lateral,Inferior & Posterior Infarcts.
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Anterior - LAD;
Lateral - Circumflex from L; Posterior - RCA; Inferior - can be either R/LCA |
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Describe the vascularization of the AV node and its R & L Bundles (Anterior & posterior branches)
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AV = RCA; R Bundle = LAD; L Bundle Anterior = LAD; L Bundle Posterior = LAD +- RCA;
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What is the Anterior Hemiblock's vessel that is occluded? EKG findings?
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Left Anterior Descending; L axis deviation with normal/slightly wider QRS, Q1S3
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RBBB with Left Axis Deviation is probably caused by (blank)
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Anterior Hemiblock.
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What is the EKG Findings in Posterior hemiblock?
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RAD, normal/slightly wider QRS, S1Q3
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intermittent changes in QRS pattern are characteristic of ?
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Intermittent BBB
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intermittent changes of QRS axis are characteristic of?
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intemrittent hemiblock
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