Lecture 25/26: ECG-Myocardial Infarction and Clinical Cases Flashcards Preview

CPR I (Cardiopulmonary and Renal I) Midterm > Lecture 25/26: ECG-Myocardial Infarction and Clinical Cases > Flashcards

Flashcards in Lecture 25/26: ECG-Myocardial Infarction and Clinical Cases Deck (14)
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1
Q

Coronary Heart Disease Clinical Manifestations

A
  • chest discomfort (heavy, pressure, crushing)
  • associated symptoms:
    • nausea, vomiting, diaphoresis, dyspnea
  • narrowing of coronary arteries secondary to Erosion, fissuring, or rupture of plaque
2
Q

NSTEMI vs STEMI

A

NSTEMI = partial occlusion (Unstable Angina)

STEMI = occluded coronary flow

most MIs caused by atherosclerosis

3
Q

ST-T Waves (Ischemia and Injury)

A

Ischemia = inverted T waves, tall peaked T waves, depressed

Injury = ST elevation

4
Q

QRS Waves (Myocardial Infaction - death)

A
  • big Q waves

- could mean that patient has had a heart attack in the past

5
Q

Cardiac Biomarkers of Necrosis

A

TROPONIN I or T

  • 1-4 hrs detectable after onset, 10-24 hours peak
  • renal failure can cause false positive cTnT
6
Q

Diagnosing STEMI in men vs women

A

Men: ST elevation of 2mm or more at J Point
- in V2-V3

Women: ST elevation of 1.5mm or more (no LVH)
- also 1mm or more in 2+ continguous chest leads

7
Q

Acute Myocardial Infaction

A

aka “ST Segment Elevation MI”

  • complete interruption of blood flow (coronary occlusion usually due to thrombus)
8
Q

What leads are associated with Left Anterior Descending Artery? What infarction do they detect?

A
  • V1-V7

Anterior Wall Infaction

9
Q

What leads are associated with Right Coronary Artery? What infarction do they detect?

A
  • II, III, aVF, V3R-V6R

Inferior Wall Infaction (RV Infaction)

10
Q

What leads are associated with Circumflex Artery? What infarction do they detect?

A
  • I, aVL, V5-V6

Lateral Wall Infaction

11
Q

What leads are associated with Posterior Descending Artery? What infarction do they detect?

A
  • V1-V3

Posterior Wall Infarction

12
Q

Ventricular Tachycardia vs Supraventricular Tachycardia

A

VTACH: wide QRS complex

SVT: narrow QRS complex, fast HR

  • atrial rate greater than 160-180, narrow, regular
  • P-wave merges with QRS complex
13
Q

Atrial Fibrillation

A
  • atrial rate > 350-600 bpm
  • no discernible P-waves
  • “irregularly irregular” ventricular rhythm
14
Q

First Degree AV Block

A
  • measure PR by observation (one large square)

- block w/> 1 block difference