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SVT = supraventricular tachycardia (an abnormally rapid heartbeat).
Tachypnea
abnormally deep and rapid breathing
The Yoga Exercise is the best for gradually slowing down the resting heart rate. Reduce your stress, medical conditions, caffeine, alcohol, tobacco, and supplements then your heart rate gradually slow down and you’ll feel better.
Cardiomegaly is the abnormal enlargement of the heart that is frequently associated with heart failure when the heart enlarges in an effort to compensate for the loss of its pumping ability (cardio means heart, and -mealy means abnormal enlargement). Tachycardia is an abnormally rapid resting heart rate (tachy- means rapid, card means heart, and -ia means abnormal condition). This term is usually applied to rates greater than 100 beats per minute. Tachycardia is the opposite of bradycardia. Paroxysmal atrial tachycardia, also known as PAT, is an episode that begins and ends abruptly during which there are very rapid and regular heartbeats that originate in the atrium. PAT is caused by an abnormality in the body's electrical system. Paroxysmal means pertaining to sudden occurrence. Ventricular tachycardia, also known as V tach, a very rapid heart beat that begins within the ventricles. This condition is potentially fatal because the heart is beating so rapidly that is is unable to adequately pump blood through the body. For some patients, this conditon can be controlled with an implantable cardioverter defibrillater.
The medical terminology combining form for "rapid" is "tachy-." For instance, tachycardia is abnormally rapid heartrate.
Hyperventilation
Ventricular tachycardia is the term for rapid heart rate starting in the ventricles. Any resting pulse rate over 100 in an adult is defined as tachycardia.
Tachypnea (Tachypnoea); Hyperventillation
fetuses have been known to carry an extremely rapid heartbeat.
Myasthenia gravis
Neoplasm