Frequent episodes of angina may be a precursor to myocardial infarction or may be variant angina, and immediate medical attention is recommended.
Angina pectoris may be a precursor to myocardial infarction if the episodes of angina pectoris are significantly more frequent, become more frequent and increasingly symptomatic, last longer, and are poorly treated with nitroglycerin. Patients usually also experience nausea, vomiting and arrhythmia with the pain, and large fluctuations in blood pressure.
However, it should be noted that some variant angina is similar to the symptoms of myocardial infarction, but the pain is generally shorter, less severe and shorter in duration, and there is often a trigger before the onset of the attack, which can be relieved after resting and taking nitroglycerin, so it should be differentiated from myocardial infarction.
Regardless of the circumstances leading to frequent angina attacks, it is important to seek immediate medical attention to avoid worsening symptoms and life-threatening conditions.