Chest pain or discomfort, upper body discomfort, shortness of breath, nausea/vomiting, sleep problems, fatigue/tiredness. If you think you or someone else may be having a heart attack, call 911 right away. Immediate treatment can save a life.

Reference:

1. Warning signs and symptoms of heart disease. (n.d.). Retrieved from https://www.mountsinai.org/health-library/selfcare-instructions/warning-signs-and-symptoms-of-heart-disease