What is the primary symptom associated with myocardial infarction (MI)?

The primary symptom associated with myocardial infarction (MI) is chest pain or pressure. This symptom arises due to the lack of oxygen reaching a portion of the heart muscle, leading to ischemia and subsequent injury or death of that tissue. The sensation can be described as a feeling of heaviness, squeezing, or a sense of constriction in the chest. This discomfort can be intense, and patients often perceive it as the most significant indicator prompting them to seek medical attention.

Chest pain related to MI is frequently accompanied by other symptoms, such as shortness of breath, radiating arm pain, nausea, and vomiting; however, these are often considered secondary symptoms. In clinical practice, the presentation of classic chest pain or pressure is essential for diagnosing MI and guiding immediate treatment.