An early sign that something is wrong with a major bodily system is shortness of breath, typically with exercise, exertion, and stress. (Typically, shortness of breath indicates either early-stage heart disease or early-stage lung disease, and it’s not possible to know which it is without seeing a doctor.) It may feel like you can’t catch your breath, or you may notice a feeling of compression in the chest and lungs, making it difficult to take a deep breath. Another breathing symptom of poor circulation may be labored breathing, which occurs when fluid accumulates in the lungs. If you notice that your breathing problems are worse at night or anytime you lie down, that can also indicate a heart problem.
Scary stat: In a landmark study by the National Institutes of Health (NIH) published in Circulation: Journal of the American Heart Institute, 95 percent of women who’d had heart attacks reported experiencing unusual symptoms in the weeks and months before the attack, and 40 percent reported shortness of breath.
Why it happens: When your heart isn’t pumping strongly enough, less oxygen circulates in your blood. The result is shortness of breath; you might feel like you do at high altitude or when you’ve run for the bus, unable to draw enough oxygen into your lungs.
What to do: Shortness of breath, either with exercise and stress or all the time, is always a reason to see the doctor for a checkup, since it can be a symptom of a number of serious conditions.