What do you understand by angina pectoris?

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Angina pectoris is:

a) Severe constricting chest pain, often radiating from the precordium to the left shoulder and down the arm, due to insufficient blood supply to the heart that is usually caused by coronary disease.

b) An often fatal form of arrhythmia characterized by rapid, irregular fibrillar twitching of the ventricles of the heart instead of normal contractions, resulting in a loss of pulse

c) The cardiovascular condition in which the heart ability to pump blood weakens

d) All of the above

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