Paul A. Friedman, M.D.

The purpose of this study is to determine whether a wristband that detects your pulse can detect your heart rate and rhythm similar to electrocardiograms (ECG).

The purpose of this study is to modify and adapt the algorithm to be usable in a mobile form factor with a limited number of leads. For this, will prospectively test and validate the adapted algorithm in outpatients presenting to the echocardiography laboratory and to test the sensitivity and specificity of a single lead ECG to identify people with decreased left ventricular EF.

The purpose of this study is to determine the accuracy of a non-invasive approach to estimate potassium levels using surface ECG's from patients undergoing hemodialysis.

The purpose of this study is to gather information to understand the effect of body position on ECGs using artificial intelligence.

The primary purpose of this study is to explore KardiaK performance in a controlled and comprehensive clinical setting, including collection of relevant data such as patient medical history, and medications affecting potassium.  In addition, it is intended to explore KardiaK performance when serial ECGs are recorded and to explore KardiaK performance using a 12-lead ECG and two novel ECG recording devices designed for home use.

The purpose of this study is to assess the serum potassium and cardiac rhythm trends in subjects with end stage renal disease (ESRD) who are on 3 times weekly maintenance hemodialysis for at least 60 days.

The purpose of this study is to observe the remote ECG signals of Nanostim pacemaker patients utilizing the AliveCor device, and compare these ECG signals with ECG recordings collected with the Nanostim device programmer during their clinical follow-up.

Prospective, non-randomized, single-arm, international multicenter, clinical safety and effectiveness of a leadless pacemaker system in patients who are indicated for a VVIR pacemaker. Following completion of enrollments in the IDE, patients will continue to be enrolled in the continued access phase of the study under the same protocol.

This is a prospective, non-randomized, multicenter, pivotal Investigational Device Exemption (IDE) study. The intent of this study is to demonstrate the safety and effectiveness of the ST Monitoring Feature in St Jude Medical ICD systems.