2. Shortness of Breath: When Air Feels Scarce
Climbing stairs leaves you gasping, even if you’re fit? John, 70, noticed this during his evening strolls. “I thought it was my lungs,” he said. Blocked coronary arteries can strain the heart, reducing oxygen delivery, per a 2020 Circulation study. John’s angiogram revealed a partial blockage. Ever pause to catch your breath after minimal effort? It’s a clue worth noting. But wait—the next sign creeps into your limbs.

3. Leg Pain or Cramping: Not Just Stiffness
Picture walking your dog, but a heavy ache in your calves forces you to stop. Mary, 69, blamed arthritis until the pain hit only during walks. Peripheral artery disease (PAD), linked to blockages, causes this, per a 2019 study in Vascular Medicine. Mary’s doctor prescribed lifestyle changes, easing her pain. You might wonder, “Isn’t it just aging?” If it’s consistent during movement, it’s a red flag. The next sign hits closer to the heart.
4. Chest Discomfort: Not Always a Heart Attack
A tight squeeze or pressure in your chest, especially during activity, isn’t always dramatic. Tom, 66, felt it gardening. “It was like a weight, not sharp,” he said. Angina, from reduced heart blood flow, signals blockages, per a 2022 American Heart Journal study. Tom’s cardiologist caught it early. You thinking, “It’s just indigestion?” If it recurs with effort, check it. The next one’s a surprising giveaway.