Type of monitor	Typical duration of use	Description	Activation and transmission of data	Indication	Cost
Holter	24 to 48 hours	Continuous monitoring; all recorded data stored	Data stored on monitoring device that is uploaded at the conclusion of monitoring period	First-line choice in ambulatory monitoring	$104
Mobile cardiovascular telemetry	One to four weeks	Continuous prolonged monitoring; all recorded data stored	Data transmitted daily by cell phone device and in real time when triggered by arrhythmia or manually by patient	Nondiagnostic Holter monitoring and/or intermittent symptoms of syncope, dizziness, or palpitations	$780
Presymptom event monitor	Two to four weeks	Continuous loop monitoring; data deleted every few minutes if device not activated	Triggered by arrhythmia or manually by patient; five to 30 minutes of pre- and postevent monitoring is recorded and transmitted by patient via telephone or e-mail	Nondiagnostic Holter monitoring and/or intermittent symptoms of syncope, dizziness, or palpitations	$305
Postsymptom event monitor	Two to four weeks	Intermittent patient-initiated monitoring	Triggered by patient activating device on wrist or placing device on chest to initiate recording; data transmitted by patient via telephone or e-mail	Nondiagnostic Holter monitoring and/or intermittent symptoms of syncope, dizziness, or palpitations	$261
Implantable loop recorder	Months to three years	Continuous loop monitoring; data deleted every few minutes if device not activated	Triggered by arrhythmia or manually by patient; five to 40 minutes of pre- and postevent monitoring is recorded; data uploaded in physician office or transmitted by patient via telephone or e-mail	Nondiagnostic, noninvasive monitoring for recurrent, intermittent symptoms of syncope, dizziness, or palpitations	$4,374