Philips SMART Biphasic therapy uses real-time impedance compensation technology to adjust and deliver personalized electric medicine for each patient on each shock. Philips biphasic therapy has been rigorously studied and is supported by substantial peer-reviewed, published data. It has been clinically proven to deliver high first shock efficacy for long-downtime SCA patients, as well as effectively defibrillate across the full spectrum of patients, including those considered “difficult-to-treat.”