myocardial infarction Flashcards
(25 cards)
inverted T waves (V2-V6)
ischemia
Wellens Syndrome
- Marked T wave inversion in leads V2 and V3
* Stenosis of anterior descending coronary
Elevation of ST segment
- injury
- tells us the MI is acute
Ventricular Aneurysm
- Cause persistent ST elevation in most of chest leads
* ST segment doesn’t return to baseline with time
Brugada Syndrome
• RBBB pattern QRS with ST elevation in V1-V3
Pericarditis
- ST segment is elevated and usually flat or concave
* Entire T wave may be elevated off baseline
Subendocardial Infarction
• Depresses the ST segment
conditions that can cause depression of ST segment
- angina
- subendocardial infarction
- positive stress test
- digitalis
Anterior infarct
Q on EKG in leads V1-V4
Lateral Infarct
Q on EKG in leads I and AVL
Inferior Infarct
Q on EKG in leads II, III, AVF
Antero-Septal Infarction
• Q waves in V1 and V2
Antero-lateral Infarction
• Q waves in V3 and V4
Posterior infarction
• Large R wave (opposite of Q) in V1 and V2
Acute posterior Infarction
- ST depression (opposite of anterior) in V1 or V2
* Large R wave
Left Bundle Branch Block
- Left ventricle depolarzes after right ventricle depolarizes
- So significant Q waves, would fall somewhere in middle of QRS complex
- Get R, R’ (bunny ears)
occlusion of circumflex branch of left coronary artery
Lateral infarction
occlusion of anterior descending branch of left coronary artery
Anterior infarction
occlusion of right coronary artery
Posterior infarction
Inferior infarction
- Left or right coronary dominance denotes which coronary artery is major source of blood supply to base of left ventricle
- RCA dominance is most common
STEMI
coronary flow is occluded
UA or NSTEMI
partial occlusion
NSTEMI
- ST segment depression
- T wave inversion
- chest pain
- elevated cardiac enzymes**
NSTE ACS
- ST segment depression
- T wave inversion
- chest pain
- Normal cardiac enzymes***
