The patient presents with acute chest pain, and the ECG shows ______ waves in leads V1-V3, indicating myocardial injury.

1 Q ✓ 정답
2 R
3 S
4 T
5 U

해설

Q waves are abnormal deflections that appear first in the QRS complex. Pathological Q waves in leads V1-V3 suggest anterior wall myocardial damage, as they represent the absence of normal electrical activity in that region of the heart muscle.

같은 주제 다음 문제The patient's EKG shows significant ST ______ in leads V2 through V4, suggesting acute ant…

임상 시나리오

ECG Wave Patterns and Interpretation: - Q waves: Initial downward deflection of QRS complex - Normal Q wave: 25% of R wave depth - Anterior MI: Q waves in V1-V4 - Inferior MI: Q waves in II, III, aVF - Lateral MI: Q waves in I, aVL, V5-V6 - QRS complex: Represents ventricular depolarization - ST elevation: Acute myocardial injury - T wave inversion: Ischemia - Minnesota Code: Standardized ECG classification - Leads V1-V3: Anterior wall monitoring - Cardiac axis: Direction of electrical activity - Bundle branch blocks: Altered QRS morphology - R wave progression: Normal R wave increases V1-V6

핵심 개념

Q wave — The first negative deflection of the QRS complex in an ECG, representing ventricular depolarization. When pathological, it indicates myocardial necrosis or scarring
R wave — The first positive deflection in the QRS complex of an ECG, representing the main wave of ventricular depolarization
S wave — The negative deflection following the R wave in the QRS complex, representing the final phase of ventricular depolarization
T wave — The wave representing ventricular repolarization in an ECG, normally appearing as a rounded, positive deflection after the QRS complex
U wave — A small, rounded deflection sometimes seen following the T wave, believed to represent repolarization of the Purkinje fibers or late repolarization of ventricular cells

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The patient presents with acute chest pain, and the ECG shows ______ waves in leads V1-V3, indicating myocardial injury.

임상 시나리오

핵심 개념

마이메르시로 국가고시 완벽 대비