Anatomy & PhysiologyCâu 77 / 100
How does stable angina differ from a myocardial infarction?
a.Angina causes permanent muscle death; an infarction does not
b.Angina is temporary ischemia relieved by rest or nitroglycerin, while an infarction is prolonged blockage causing tissue death
c.Angina always shows ST elevation; an infarction never does
d.Angina occurs only at rest; an infarction occurs only with exertion
Giải thích
Angina is chest pain from temporary oxygen shortage in the myocardium, typically brought on by exertion and relieved within minutes by rest or nitroglycerin, and it may show transient ST depression or T wave inversion. A myocardial infarction is sustained occlusion that kills muscle tissue and often produces ST elevation and later Q waves. It is the infarction, not angina, that causes permanent damage.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- How is cardiac output calculated?
- What happens during ventricular diastole?
- A patient arrives with crushing chest pain radiating to the left jaw. The 12-lead shows ST segment elevation in leads II, III, and aVF. What does this pattern most likely represent?
- A patient scheduled for an EKG has ankle swelling, shortness of breath when lying flat, and a history of congestive heart failure. What is happening physiologically?
- Long-standing untreated hypertension most commonly produces which EKG-related change?
- Which layer of the heart wall is the thick muscular layer responsible for contraction?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với NHA Certified EKG Technician (CET) Exam · Quy trình kiểm tra