Remember the basic concept. In stable angina fixed atheroma grows to block 70%of vessel & in unstable form, this atheroma breaks up-to include platelets aggregation with dissemination.

⇒Insufficient blood flow to the heart muscle from narrowing of coronary artery may cause chest pain.


  1. Stable angina: reversible type. blocks occurs due to atheroma formation in coronary wall overtime. symptoms produce after >70 artery stenosis.
  2. Unstable angina: when atheroma raptures due too any cause, there occurs dissemination of thrombotic products with massive platelet aggregation leading to nearly complete obstruction and tissue necrosis. Unstable angina is part of acute coronary syndrome.
  3.  variant angina(or Prinzmetal angina) : characterized by vasospasm of coronary arteries obstructing blood flow.

Signs & symptoms:

  • Precipitation: exertion or emotional stress. Full stomach , cold temperature, pain may be accompanied by breathlessness, sweating and nausea.
  • Chest discomfort: described as a pressure, heaviness, tightness, squeezing, burning, or chocking sensation.
  • Pain: in the epigastrium(upper central abdomen), back, neck area, jaw and shoulders.
  • Autoimmune symptoms: nausea, vomiting and pallor

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