4. Irregular Heartbeat
Another early sign that the cardiovascular system is not functioning properly is an irregular heartbeat or arrhythmia. This is hard to mistake for anything else, as it may feel like the heart is skipping beats, or beating too hard and too fast. The most common cause of irregular heartbeat is CAD, which restricts the blood flow to the heart throw blocked arteries. This strains the body’s electrical system and throws your heartbeat out of rhythm.
