As a medical professional, I can provide you with information on the symptoms of insufficient oxygen supply to the heart, which is a condition known as ischemia. The most common cause of reduced blood flow to the heart muscle is coronary artery disease (CAD). It's important to note that not all cases of CAD will present with the same symptoms, and some individuals may not experience any symptoms at all, especially if the narrowing of the heart arteries is gradual. Symptoms of lack of oxygen to the heart can include: 1. Chest pain or discomfort, often described as a feeling of pressure, fullness, or pain in the center of the chest. This is known as angina and can occur with physical exertion or stress and may subside with rest. 2. Shortness of breath, which can occur with or without chest pain and may be a sign that the heart is struggling to pump effectively. 3. Fatigue, especially during physical activities that would normally not cause tiredness. 4. Lightheadedness, dizziness, or a sense of imbalance, which can be due to reduced oxygen supply to the brain. 5. Nausea or indigestion, which can sometimes be mistaken for gastrointestinal issues. 6. Sweating, which can be a sign of the body's response to stress caused by the lack of oxygen. 7. Pain or discomfort that radiates from the chest to other areas such as the jaw, neck, arm, or back. It's important to seek immediate medical attention if you experience severe chest pain, especially if it's accompanied by other symptoms like shortness of breath, dizziness, or nausea. read more >>

When your heart muscle isn't getting enough oxygen, it causes a condition called ischemia. The most common cause of reduced blood flow to your heart muscle is coronary artery disease (CAD). ... You may wonder why you don't always have angina if your heart arteries are narrowed due to fatty buildup.read more >>