Ekg Chapter 9

Front 1

Infarction in ventricles can often be fatal. Why?

Back 1

Nearby Hypoxic Ventricular foci can produce serious ventricular arrrhythmias.

Front 2

Ischemia is characterized on an EKG by an inverted and symmetrical (blank).

Back 2

T wave

Front 3

Acute myocardial injury is denoted on an EKG by ST segment (blank)

Back 3

elevation

Front 4

Persistent ST segment elevation in the precordial leads is related to what condition?

Back 4

Ventricular Aneurysm

Front 5

ST segment elevation along with (blank) can denote severity of the infarction.

Back 5

Q waves (no Qs usually less severe)

Front 6

Describe the Effect of Pericarditis on the ST segment.

Back 6

Elevation of ST that is flat or slightly concave.

Front 7

Flat ST depression can be seen in (blank location) infarction

Back 7

subendocardial

Front 8

Significant Q waves (0.04s, 1mm, or 1/3 QRS) indicate (blank).

Back 8

necrosis

Front 9

Describe where best to appreciate Q waves in Anterior, Lateral & Inferior Infarcts.

Back 9

Anterior - V1-V4;
Lateral - I, AVL;
Inferior - II, III, AVF

Front 10

What would you see in V1-V2 with Acute Anterior Infarction?

Back 10

ST elevation with Significant Q waves

Front 11

What would you see in V1-V2 with Acute Posterior Infarction?

Back 11

Large R wave with ST depression (note that this is the opposite of Acute Anterior).

Front 12

Why does LBBB complicate infarction diagnosis on EKG?

Back 12

Delay causes Q waves from the Left to fall within the middle of the QRS complex and may not be detected.

Front 13

Describe the coronary vessels responsible in Anterior, Lateral,Inferior & Posterior Infarcts.

Back 13

Anterior - LAD;
Lateral - Circumflex from L;
Posterior - RCA;
Inferior - can be either R/LCA

Front 14

Describe the vascularization of the AV node and its R & L Bundles (Anterior & posterior branches)

Back 14

AV = RCA; R Bundle = LAD; L Bundle Anterior = LAD; L Bundle Posterior = LAD +- RCA;

Front 15

What is the Anterior Hemiblock's vessel that is occluded? EKG findings?

Back 15

Left Anterior Descending; L axis deviation with normal/slightly wider QRS, Q1S3

Front 16

RBBB with Left Axis Deviation is probably caused by (blank)

Back 16

Anterior Hemiblock.

Front 17

What is the EKG Findings in Posterior hemiblock?

Back 17

RAD, normal/slightly wider QRS, S1Q3

Front 18

intermittent changes in QRS pattern are characteristic of ?

Back 18

Intermittent BBB

Front 19

intermittent changes of QRS axis are characteristic of?

Back 19

intemrittent hemiblock