The purpose of this research is to simplify the standard recording system of the heart rhythm. The investigators desire to improve the ease of monitoring the cardiac rhythm for 24 hours. The investigators intent is to use a very small, innovative monitoring patch system that relieves the patient of wearing a cumbersome and uncomfortable recording system. This research trial will carry the title "The Simple ECG Monitoring" for Comparison of a Sternal ECG Recording System with a Standard ECG Recording System for Holter Monitoring. The data from the investigational device is for comparative purposes only. It will not be used by medical personnel for study subject treatment or diagnostic purposes.

Externally applied cardiac rhythm monitors are common tools used to diagnose symptoms that may or may not be related to cardiac rhythm abnormalities. Common problems that may lead to the use of cardiac rhythm monitors are syncope (loss of consciousness), near-syncope (near loss of consciousness), palpitations (the sensation of an abnormal heart beat), or monitoring of known cardiac rhythm problems like atrial fibrillation. The purpose of this research is to confirm the clinical value of a much easier-to-use cardiac rhythm monitoring system, hereafter referred to as the Investigational Monitoring System. Prior to discussing the investigational monitoring system, we will review standard electrocardiographic monitoring tools used to evaluate the heart's rhythm.

Excluding a routine 12 lead electrocardiogram that takes a snapshot view of the hearts electrical signal, the most common tool for monitoring the heart rhythm is a Holter monitor. A Holter monitor is also called an ambulatory cardiac monitor. A Holter monitor records every heartbeat for 24 hours. It requires wearing multiple electrodes and carrying a recording system that is usually worn on a belt or on a holster strap. Such systems are relatively bulky and difficult to conceal in public venues. Also, their electrodes often disconnect, especially during sleep when the patient is unaware of electrode detachments that can occur when turning or during exercise. Moreover, they can't be worn during showering. These shortcomings notwithstanding, standard Holters remain the standard of care.

Inclusion Criteria:

• Syncope of uncertain etiology or
• Pre-syncope of uncertain etiology or
• Palpitations of uncertain etiology or
• Management of known AF/SVT patients

Exclusion Criteria:

• Any abnormal or friable skin over the anterior thorax and upper abdomen
• Sternal incision within 3 months from the date of enrollment

Primary Care Clinic referral, Cardiology Clinic, Electrophysiology Clinic