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Palpitations are perceived abnormalities of the heartbeat characterized by awareness of cardiac muscle contractions in the chest, which is further characterized by the hard, fast and/or irregular beatings of the heart.
This interferes with the blood flow to the heart muscle and causes symptoms otherwise indistinguishable from unstable angina. [ 8 ] It is possible that even in people without direct evidence of allergy, the allergic response may be playing a role in acute coronary syndrome: markers of mast cell activation are found in people with ACS.
[11] [12] Further, this adrenaline surge triggers the arteries to tighten, thereby raising blood pressure and placing more stress on the heart, and may lead to spasm of the coronary arteries that supply blood to the heart muscle. [10] This impairs the arteries from delivering adequate blood flow and oxygen to the heart muscle. [10]
Hypertrophic cardiomyopathy (HCM) is a condition where some of the heart muscle becomes too thick, (a.k.a., hypertrophied, a typical diagnostic criterion is a 15 millimeters or greater left ...
Hiccups are "involuntary spasms of the diaphragm," Pullins explains. The diaphragm is the dome-shaped muscle that's located below the lungs and heart. When these spasms or involuntary contractions ...
Angina, also known as angina pectoris, is chest pain or pressure, usually caused by insufficient blood flow to the heart muscle (myocardium). [2] It is most commonly a symptom of coronary artery disease. [2] Angina is typically the result of partial obstruction or spasm of the arteries that supply blood to the heart muscle. [3]
Myoclonus is a brief, involuntary, irregular (lacking rhythm) twitching of a muscle, a joint, or a group of muscles, different from clonus, which is rhythmic or regular. Myoclonus ( myo- "muscle", clonus "spasm") describes a medical sign and, generally, is not a diagnosis of a disease .
Acute coronary syndrome (ACS) is a syndrome due to decreased blood flow in the coronary arteries such that part of the heart muscle is unable to function properly or dies. [1] The most common symptom is centrally located pressure-like chest pain , often radiating to the left shoulder [ 2 ] or angle of the jaw, and associated with nausea and ...