The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Background: Shock-induced myocardial depolarization depends on shock strength and membrane refractoriness and so non-uniform shock responses should arise in the heart.Methods: To test this we mapped optical action potentials with a Laser Imaging system at 10000 sites on the right ventricles of 5 perfused rabbit hearts stained by di-4-ANEPPS. Images were obtained at a 5 ms frame interval. Shocks...
Purpose: To characterize the degree (Δ THK) and rate of atrial wall thickening subsequent to ablation using intracardiac echocardiography (ICE).Methods: ICE (9 MHz) imaging guided catheter ablations in the right (RA) and left atrium (LA) were performed in 7 closed chest swine (80-120 kg). Energy applications (maximal power-empiric, temperature [T] recording-passive, upto 120 sec) created 60 discrete...
Background: A well designed low-energy impedance-compensating biphasic waveform allows automatic external defibrillator (AED) characteristics more suitable to early defibrillation (smaller, lighter) than high-energy waveforms. This study observed such an AED on 100 consecutive victims of out-of-hospital cardiac arrest.Methods: AEDs incorporating 150 J impedance-compensating biphasic waveforms were...
An approach called voltage-sensitive-dye recording is introduced for the study of electrical defibrillation of the heart. Voltage-sensitive dyes (VSDs) are molecular probes which transduce cellular potential into an optical signal. Specifically, the optical signals produced by VSDs can be used to follow the time-course of cardiac action potentials. This style of recording is advantageous because the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.