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Wearable cardioverter defibrillator : ウィキペディア英語版
Wearable cardioverter defibrillator

The wearable cardioverter defibrillator (WCD) is worn by patients at risk for sudden cardiac arrest (SCA), allowing their physician time to assess their long-term arrhythmic risk and make appropriate plans.
The WCD is lightweight and easy to wear, allowing patients to return to their activities of daily living, while having the peace of mind that they are protected from SCA. The WCD is non-invasive and consists of two main components – a garment and a monitor. The garment, worn under the clothing, detects arrhythmias and delivers treatment shocks. The monitor is worn around the waist or from a shoulder strap and records the arrhythmias. The WCD continuously monitors the patient’s heart and, if a life-threatening heart rhythm is detected, the device delivers a treatment shock to restore normal heart rhythm. The entire event, from detecting a life-threatening arrhythmia to automatically delivering a treatment shock, usually occurs in less than a minute. Timely defibrillation is the single most important factor in saving an SCA victim’s life. A treatment shock must be delivered within a few minutes after an event to be effective; with each passing minute, a patient’s chances of survival drops 10 percent. The WCD does not require bystander intervention and has a 98 percent first treatment shock success rate for resuscitating patients from SCA.
The WCD may be prescribed for patients at high risk of SCA following a heart attack, before or after bypass surgery or stent placement, as well as for those with cardiomyopathy or congestive heart failure that places them at particular risk.
The WCD is a therapeutic option, listed along with implantable cardioverter defibrillators (ICDs), in the ACC/AHA/ESC Guidelines for the Management of Patients with Ventricular Arrhythmias and the Prevention of Sudden Cardiac Death. It is also a Class I recommendation in the International Society for Heart and Lung Transplantation Guidelines for the Care of Cardiac Transplant Candidates.
== History ==

In 1986, M. Stephen Heilman and Larry Bowling founded Lifecor and along with a team of former Intec employees who developed the first implantable cardioverter defibrillator (ICD) began development of the WCD. The WCD was extensively tested for three years in 17 major medical centers across the United States and Europe. The clinical data collected from those trials allowed Lifecor to obtain FDA approval for use of the WCD in the United States.
In 2001, the FDA approved the LifeVest wearable cardioverter defibrillator. The Lifecor business was acquired by ZOLL Medical Corporation in 2006 and Asahi Kasei in 2012. The LifeVest is currently marketed in the United States, Europe, and Israel.
According to ZOLL, the company that manufactures the LifeVest, the LifeVest has been prescribed to more than 100,000 patients.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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