Can happen at any moment, even at rest, and does not get better with treatment that helps with stable angina.

• A. Stable angina
• B. Unstable angina
• C. Ischemic stroke
• D. Embolic stroke

Answer: (B)

Unstable angina is marked by chest pain that can occur at any moment, even at rest, and may not respond to treatments that normally help stable angina. In stable angina, pain happens with increased heart workload (like during exercise) and eases with rest or nitroglycerin because the coronary narrowing is fixed. In unstable angina, a plaque may rupture and a platelet-rich clot forms, causing dynamic, ongoing ischemia that can persist despite rest or usual antianginal therapy. This pattern signals a higher risk of progression to a heart attack and requires urgent evaluation. The other conditions described would present with symptoms not centered on chest pain from coronary ischemia (for example, neurological deficits in strokes), so they don’t fit the scenario described.