NSTEMI and Unstable Angina

A 58-year-old man with hypertension and dyslipidemia presents with chest pain at rest for 2 hours. ECG shows ST-segment depression in leads II, III, aVF with elevated troponin I. He is haemodynamically stable. Which of the following is the drug of choice for immediate antiplatelet therapy in this patient with NSTEMI?

A 58-year-old man with hypertension and dyslipidemia presents to the emergency department with chest pain of 3 hours duration, radiating to the left arm, associated with diaphoresis. His initial 12-lead ECG shows ST depression in leads II, III, aVF with T-wave inversion. Troponin I at presentation is negative. What is the most appropriate next investigation to confirm acute coronary syndrome and guide risk stratification?

A 65-year-old woman with diabetes and dyslipidemia presents with acute-onset chest pain and dyspnea. Troponin is elevated, and ECG shows ST depression in multiple leads without ST elevation. She is diagnosed with NSTEMI. Which is the most common underlying pathological mechanism responsible for NSTEMI?

A 58-year-old man with hypertension and dyslipidemia presents to the emergency department with chest pain of 3 hours duration. The pain is substernal, radiating to the left arm, and associated with diaphoresis. His initial ECG shows ST depression in leads II, III, aVF, and V3–V4 with T-wave inversion. Troponin I at presentation is negative. Vital signs are stable. What is the most appropriate immediate next step in management?

A 62-year-old woman from Mumbai with a history of hypertension and smoking presents to the emergency department with 2 episodes of chest pain over the past 6 hours, each lasting 15–20 minutes and relieved by rest. The most recent episode occurred 30 minutes ago. She denies dyspnea or diaphoresis. Vital signs are stable: BP 135/88 mmHg, HR 78 bpm. Physical examination is unremarkable. 12-lead ECG shows T-wave inversion in leads V2–V4. Troponin I measured at presentation is <0.01 ng/mL (normal). Repeat troponin 3 hours later is also <0.01 ng/mL. What is the most likely diagnosis?