portable defibrillator temporarily existing, elevated risk are protected for life-threatening, rapid heart rhythm disturbances, for example, before implantation of an ICD or CRT-D, they can be protected) by a defibrillator vest (wearable cardioverter-defibrillator, WCD. This is in addition to existing Tachyarrhythmierisiko with unknown sequence or persistent risk to bridge a period in which the patient is inoperable, apply.
The WCD is a therapeutic device, which consists essentially of two components. The right has on the skin of the upper body electrode belt to be worn four ECG electrodes and three electrode therapy. The cable transmits two ECG leads for cardiac rhythm monitoring on a monitor device, the actual defibrillator.
Upon detection of a malignant arrhythmia fast portable defibrillator the device automatically starts the treatment mode. This is visually, acoustically and through a vibration alarm signals directly to the patient and the environment. Responds the patient because no loss of consciousness, the necessary treatment procedure is performed automatically by the defibrillator vest.
In the unconscious patient is in the rear and below the left breast sedentary life-saving shock therapy to the electrodes. This is on account of loss of consciousness for the patient and thus do not appreciably painless.
Unless portable defibrillator the patient during therapy alarm is still conscious, he suppressed by means of two response keys a shock. In a later loss of consciousness, he can not press more buttons, the reaction and the device then continues the treatment mode to saving electric shock.
Stops the fast rhythm disorder by itself, the WCD terminated automatically after normal ECG signal is detected the treatment process.
All critical rhythm events are stored in the monitor by the attending physician and are available on an Internet database.
The city of Amsterdam has also made defective defibrillator a similar study: the areas covered were alternately
experimental area: firefighters and police officers were equipped with DSA (1063 policemen and 586 firemen trained), and were activated one minute after the ambulance paramedic (due to the time of transmission of information);
control zone: normal intervention procedure, only one ambulance was sent paramédicalisée.
In approximately 66% of cases of cardiac arrest occurred before witnesses (469 cases in total), the victim was in ventricular fibrillation on arrival of the DSA. The integration of DSA in vehicles of firefighters and police helped to shorten the response time of 1 minute 40 seconds (time between cardiac arrest and delivery of shock). The public access defibrillator time of implementation of DSA was about 2 ½ minutes for both groups (time between arrival and the issuance of the first shock). In both groups, 44% of patients who received the shock in less than 5 minutes have survived, which shows the importance of early defibrillation.
However, if the rate of recovery of spontaneous cardiac activity was better in the experiment group, the survival rate after hospital stay was almost the same. This is mainly attributed to the low gain of recorded time, especially due to the time portable defibrillator of transmission of information.