what are the signs of a heart?
['Pressure, tightness, pain, or a squeezing or aching sensation in your chest or arms that may spread to your neck, jaw or back.', 'Nausea, indigestion, heartburn or abdominal pain.', 'Shortness of breath.', 'Cold sweat.', 'Fatigue.', 'Lightheadedness or sudden dizziness.']