This inherited disease is common in individuals who have a family history of syncope , also known as fainting. When ventricular tachycardia lasts a short time, there may be no symptoms except palpitations — a fluttering in the chest. But ventricular tachycardia lasting more than 30 seconds may cause more severe symptoms:. Fainting syncope. Radiofrequency ablation : a minimally invasive procedure to destroy the cells that cause ventricular tachycardia; less effective when there is structural heart disease.
Implantable cardioverter defibrillator ICD : an implanted device that delivers an electrical pulse to the heart to reset a dangerously irregular heartbeat. Medication : A number of antiarrhythmic medications are used to prevent ventricular tachycardia. Causes of Fainting Syncope Email. There are many possible reasons: A decrease in blood pressure Sudden relaxation of the smaller arteries of the abdomen or legs A sudden decrease in heart rate or an abnormal heart rhythm Some of the more common causes of fainting are described below.
Neurocardiogenic and Vasovagal Syncope Neurocardiogenic Syncope Neurocardiogenic and vasovagal syncope are the most common type of fainting in children. Vasovagal Syncope Vasovagal syncope is caused in a way similar to neurocardiogenic syncope. Left Ventricle Outflow Tract Obstruction Left ventricular outflow tract obstruction can be caused by abnormal thickening from hypertrophic cardiomyopathy or may be due to development of localized obstruction at the level of the aortic valve or just below it subaortic stenosis.
Pulmonary Hypertension Fainting caused by pulmonary hypertension can occur anytime, but it often happens with exercise. Arrhythmia Most abnormal heart rhythms arrhythmias in children do not typically result in fainting spells.
Tumor or Mass Although it is rare, a tumor or tumor-like mass in the heart may block blood flow into or out of the heart, leading to fainting.
Heart News 1 2 3 4 5 Next ». What Causes Atrial Fibrillation? View All News. More HeartSmarts for You Abnormal Heart Rhythms. Atrial Septostomy. Catheter-Based Valve Implantation. Causes of Congenital Heart Disease. Causes of Fainting Syncope. Chest Pain in Children. Closing Holes in the Heart. Congenital Aortic Stenosis. Learn how SCAI is advancing patient care ».
National Heart, Lung, and Blood Institute. Accessed Feb. Riggin EA. Allscripts EPSi. Mayo Clinic. Ferri FF. Supraventricular tachycardia. In: Ferri's Clinical Advisor Elsevier; Accessed March 30, Zipes DP, et al. Surgery for atrial fibrillation and other SVTs. Saul JP, et al. Heart Rhythm. Chen C, et al. A multicenter randomized controlled trial of a modified Valsalva maneuver for cardioversion of supraventricular tachycardias.
American Journal of Emergency Medicine. Dubin AM. Management of supraventricular tachycardia in children. Accessed March 31, Crawford MH, ed. Supraventricular tachycardias. McGraw Hill; American Heart Association.
Heart failure , atrial fibrillation and other serious cardiac conditions can cause recurrent syncope in older adults, with a sharp increase after age Younger people without cardiac disease but who've experienced syncope while standing or have specific stress or situational triggers aren't as likely to experience cardiac syncope.
Cardiac syncope is a higher risk in: people older than age 60; men; presence of known heart disease; brief palpitations or sudden loss of consciousness; fainting during exertion; fainting while supine; an abnormal cardiac exam; or family history of inheritable conditions. Other existing conditions and medications used are particularly important in older patients. People who experience the warning signs of fainting of dizziness, nausea and sweaty palms should sit or lie down.
Anyone with syncope should receive an initial evaluation, including detailed physical and history examinations and measurement of blood pressure and heart rate, by a physician. An ECG electrocardiogram also is recommended as part of an initial evaluation to provide information about the cause of syncope. ECG is widely available and inexpensive and can provide information about the potential and specific cause of syncope for example, abnormal heart rhythms.
Other tests, such as exercise stress test , Holter monitor and an echocardiogram , may be needed to rule out other cardiac causes. An ECG also is recommended for children and young adults with syncope.
Other noninvasive diagnostic testing may be needed if they're suspected of having congenital heart disease , cardiomyopathy or a heart rhythm disorder. If the initial evaluation is unclear, it may be useful for patients to undergo a tilt test.
The blood pressure and heart rate will be measured while lying on a board and with the board tilted up. People with NMS usually will faint during the tilt, due to the rapid drop in blood pressure and heart rate.
When people are placed on their back again, blood flow and consciousness are restored. Patients with VVS and without a serious medical condition usually can be managed in an outpatient setting. For older adults, a comprehensive approach in collaboration with a geriatric expert can be helpful.
0コメント