Angina is a type of chest pain or discomfort that occurs when the heart does not receive enough oxygen-rich blood. It is often described as a pressure, squeezing, burning, or tightness in the chest. Angina can also occur in the arms, neck, jaw, shoulder, or back. Stable angina occurs during physical activity or emotional stress, while unstable angina occurs at rest or with minimal physical activity and is more severe and unpredictable.
Arrhythmia is a condition where the heart beats too fast, too slow, or irregularly. Arrhythmias can be harmless or life-threatening, depending on the type and severity of the condition. Stable arrhythmias are those that do not pose an immediate threat to the patient's life. Unstable cardiac arrhythmia is a type of arrhythmia that is characterized by irregular, rapid, or slow heartbeats that can lead to sudden cardiac arrest or death if not treated promptly.
Heart failure is a chronic condition in which the heart is unable to pump enough blood to meet the body's needs. Asymptomatic heart failure means there are no noticeable symptoms. Symptomatic heart failure refers to heart failure that causes noticeable symptoms, such as shortness of breath, fatigue, and swelling in the legs and ankles. These symptoms occur when the heart is not pumping effectively, leading to a buildup of fluid in the body.