Mr. Dien, 71, experienced multiple fainting episodes, leading doctors to diagnose severe narrowing in three major heart arteries, despite the absence of typical coronary artery disease symptoms like chest pain or shortness of breath.

Chest pain from gastroesophageal reflux often persists and can be easily mistaken for an acute cardiovascular event if accompanying signs are not carefully observed.

A 68-year-old man, experiencing chest pain for 3 days, called for an at-home IV drip, leading to a severe drop in his heart rate and a subsequent diagnosis of myocardial infarction upon hospital admission.