Coronary Artery Disease (CAD) affects more than 13 million American. Caused by blockages in the arteries that nourish the heart with blood, it can lead to heart attacks and is the most common cause of death in the United States. Watch for these warning signs.

1. Chest Discomfort

Also known as angina, mild to severe pain, tightness, pressure or tingling can be a sign of CAD. These sensations can be triggered by eating, emotion, exercise, cold weather – or nothing at all.

2. Pain in Strange Places

You can also feel discomfort or pain in unexpected spots like the jaw, arms, left shoulder, neck or back. Sometimes pain starts in the chest and spreads toward the left.

3. Breathing Trouble

Shortness of breath can be a symptom of either heart or lung disorders. Both are serious. If you have difficulty breathing, consult your doctor.

4. “Digestive” Distress

Heart trouble can make you feel full, nauseous or as though you’re choking or have heartburn. It can cause stomach pain and even make you vomit.

5. Flip-Flopping Heart

Rapid or irregular heartbeats usually signal an arrhythmia like atrial fibrillation. But they can also be a sign of coronary artery disease. Consult your doctor for a diagnosis.

6. Dizziness

CAD can spook you by making you feel dizzy, light-headed, anxious, fatigued or sleepless. You can also break into a hot or cold sweat.