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AngelMed for Early Recognition and Treatment of STEMI (ALERTS)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00781118
Recruitment Status : Active, not recruiting
First Posted : October 28, 2008
Last Update Posted : September 28, 2016
Symbios Clinical
Information provided by (Responsible Party):
Angel Medical Systems

Brief Summary:
A prospective, randomized multicenter study of subjects with a high-risk of having a myocardial infarction (MI) due to acute coronary syndrome or bypass surgery.

Condition or disease Intervention/treatment Phase
Acute Myocardial Infarction (AMI) Coronary Occlusion Acute Coronary Syndrome Device: Guardian System Phase 3

Detailed Description:

There are over one million acute myocardial infarctions (AMI) each year in the United States with more than 400,000 of these resulting in death. Early identification of AMI, and prompt treatment has been shown to significantly improve clinical outcomes. Experimental and clinical studies have shown that most of the irreversible damage to the myocardium occurs during the first two hours after coronary occlusion. Milavetz et al. demonstrated that successful reperfusion therapy within two hours was associated with the greatest degree of myocardial salvage. According to Boersma, et al., restoration of flow, regardless of the method used, can abort infarction within the first 30 minutes after coronary occlusion, and the benefit of fibrinolytic therapy compared with placebo is considerably higher in patients treated within 2 hours after symptom onset than in those treated later.2 Further, evidence exists that expeditious restoration of flow in the obstructed infarct artery after the onset of symptoms in patients with the most severe type of MI, ST elevation MI (STEMI) is a key determinant of short and long-term outcomes regardless of whether reperfusion is accomplished by fibrinolysis or percutaneous coronary intervention (PCI). Therefore, the early arrival at the hospital for a reliable diagnosis and initiation of treatment is paramount to improve the outcomes of myocardial infarction. However, despite efforts at educating the public over the past decade, the mean time from AMI symptom onset to arrival at a hospital for treatment has remained, disappointingly, at 2.5-3.0 hours.

The largest proportion of the total pre-hospital delay is the interval between the onset of symptoms and the decision to seek medical treatment. Finnegan et al. described that the reasons for delay in seeking medical evaluation generally stem from patient misconceptions about symptom experience, expectations, and attribution. In many cases, patients expect the type of heart attack that they often see in movies or on television: the kind of crushing chest pain that drops a person to the ground. The reality is that many heart attacks are much "quieter," causing only mild chest pain or discomfort or other symptoms such as shortness of breath or diaphoresis.

If patients would take action during the first hour following symptom onset, many lives and significant cost could be saved. It is technically possible to monitor EKGs and detect an acute infarction, even if the patient is unaware that he or she is experiencing a heart attack. However, currently available systems have limitations in the home environment. Twelve lead EKG systems require a clinically trained individual to place them. Holter monitors suffer from limitations in the ability to detect ST deviation due to low compliance and are limited in practice to 24 to 72 hours of monitoring. Systems using surface leads are all subject to noise and other artifacts from patient movement and body orientation, particularly if the patient is ambulatory.

A potentially ideal solution is to implant a device that measures heart signals from inside the heart and will alert the patient when it detects electrogram characteristics set by the physician as worthy of medical evaluation.

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 1020 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: AngelMed for Early Recognition and Treatment of STEMI
Study Start Date : December 2008
Primary Completion Date : January 2014
Estimated Study Completion Date : July 2017

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Heart Attack
U.S. FDA Resources

Arm Intervention/treatment
Experimental: Treatment

There is no intervention administered in the ALERTS Study. The study is testing whether or not a patient alarm from the Guardian System will bring them into the ER faster than symptoms only in the event of a heart attack.

The Treatment arm has alerting enabled in their device. The Control arm has alerting disabled in their device. Once a patient arrives at the ER, the standard of care triage process for MI is followed and that is outside of the ALERTS Study protocol.

Device: Guardian System
There is no intervention in this study. The device is a diagnostic only.

There is no intervention administered in the ALERTS Study. The study is testing whether or not a patient alarm from the Guardian System will bring them into the ER faster than symptoms only in the event of a heart attack.

The Treatment arm has alerting enabled in their device. The Control arm has alerting disabled in their device. Once a patient arrives at the ER, the standard of care triage process for MI is followed and that is outside of the ALERTS Study protocol.

Device: Guardian System
There is no intervention in this study. The device is a diagnostic only.

Primary Outcome Measures :
  1. The primary efficacy objective is to determine that the Guardian System reduces the composite of Cardiac or unexplained death, new Q-wave MI and time to door for a confirmed occlusive event at a medical facility >2 hours [ Time Frame: Due to Bayesian statistical analysis, the study data will be analyzed after subject enrollment reaches 600, 900, 1200, etc. ]

Secondary Outcome Measures :
  1. - Reduction of the incidence of cardiac death or unexplained death during follow-up - Reduction of the incidence of "New" Q-wave myocardial infarction in one or more distributions during follow-up - Reduction of the time to door for confirmed STEMI [ Time Frame: Due to Bayesian statistical analysis, the study data will be analyzed after subject enrollment reaches 600, 900, 1200, etc ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   21 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subject has at least one of the following conditions:

    1. Diabetes (Type I or Type II)
    2. Compromised renal function (Cr > 1.2 mg/dl or creatinine clearance less than 50)
    3. TIMI Risk Score ≥ 3
  • Presents (within past 6 months) with a high-risk acute coronary syndrome (e.g., Unstable Angina, STEMI or NSTEMI) or has undergone or is scheduled for CABG within 6 months of implantation.
  • Has already undergone coronary angiography and revascularization, unless the physician determines it is appropriate to implant before or during the planned procedure.
  • Lives in a geographic area in close proximity (within 60 minutes by EMS) to any hospital that can treat AMI.
  • Subjects (men or women) at least 21 years of age. Women of childbearing age must have a negative pregnancy test or confirmation of one of the following:

    1. Post-menopause or amenorrheic during the past year
    2. Surgical sterilization
    3. Use of effective contraceptive method

Exclusion Criteria:

  • In the investigator's opinion, subject lacks ability to respond appropriately to alarms, e.g., illiteracy, poor memory or cognitive function, dementia or other condition affecting memory function, etc.
  • There is known compromised tissue at the site of lead implantation in the apex of the right ventricle, e.g., prior infarct affecting the RV apex location.
  • A permanent pacemaker or ICD is already in place or the patient is indicated for ICD or pacemaker implantation based on the guidelines published by the American College of Cardiology as Class I and IIa recommendations. Class IIb recommendations are at the investigator's discretion.
  • Subject cannot feel the IMD vibration when placed on top of the skin on the left pectoral side of the chest.
  • Subject has recurrent or persistent atrial fibrillation.
  • Subject has recurrent or persistent non-sinus cardiac rhythm, second or third degree atrioventricular blocks, QRS duration greater than 120 ms, Benign Early Repolarization (BER), or Brugada Syndrome.
  • Subject has left ventricular hypertrophy evidenced by EKG criteria.
  • Subject has any condition preventing the subcutaneous implantation of the Guardian System in a left pectoral pouch, such as: superior vena cava thrombosis, subcutaneous tissue deemed inappropriate for the procedure or prior central venous access via portacath, Hickman, Groshong, or similar placed in a left pectoral location or left side PICC line.
  • Subject has extremely heavy alcohol consumption (participates in binge drinking that leads to alcohol intoxication) or has history of alcohol or illicit drug abuse within past 5 years.
  • There is evidence of unresolved infection (fever > 38° C and/or leukocytosis > 15,000).
  • Subject has history of bleeding disorders or severe coagulopathy (platelets < 100,000 plts/ml; APTT or PT > 1.3 x reference range).
  • Subject has had a hemorrhagic stroke or transient ischemic attack (TIA) in the past 6 months.
  • Subject has other severe diseases, such as cancer or refractory congestive heart failure, associated with limitation of life expectancy (less than 1 year), which may lead to inadequate compliance to the protocol or confusing data interpretation.
  • Subject has clinical conditions such as heart diseases, difficult-to-control blood pressure, difficult-to-control insulin-dependent diabetes or serious prior infections attributed to the diabetes, or others that, at the investigator's discretion, could seriously affect the subject's current clinical condition during study procedures.
  • Subject has previous participation in the DETECT Study, current participation or previous participation in another drug or device study in the past 30 days that conflicts with this study as determined by the study sponsor.
  • Subject has experienced gastro-intestinal hemorrhage in the past 6 months.
  • Subject has any situation in which the use of aspirin is contraindicated for at least 6 months.
  • Subject has epilepsy.
  • Subject has known severe allergies, e.g., peanut, bee sting, etc.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00781118

  Hide Study Locations
United States, Alabama
Cardiology, P.C.
Birmingham, Alabama, United States, 35211
Heart Center Research/Huntsville Hospital
Huntsville, Alabama, United States, 35801
United States, Arizona
Banner Heart Hospital
Mesa, Arizona, United States, 85206
Banner Good Samaritan Medical Center
Phoenix, Arizona, United States, 85006
Southwest Heart Group
Tucson, Arizona, United States, 85710
United States, California
John Muir Clinical Research Center
Concord, California, United States, 94520
California Clinical Research Foundation
Glendale, California, United States, 91204
Long Beach Memorial Medical Center
Long Beach, California, United States, 90806
Mission Internal Medical Group
Mission Viejo, California, United States, 92691
Orange County Heart Institute and Research Center Hospital
Orange, California, United States, 92868
Huntington Memorial Hospital
Pasadena, California, United States, 91105
University of California Davis Medical Center
Sacramento, California, United States, 95817
Sutter Memorial Hospital
Sacramento, California, United States, 95819
Salinas Valley Memorial Hospital
Salinas, California, United States, 93901
Radiant Research
Santa Rosa, California, United States, 95405
United States, District of Columbia
Washington Hospital Center
Washington, District of Columbia, United States, 20010
United States, Florida
Bay Pines VA Healthcare System
Bay Pines, Florida, United States, 33744
Daytona Heart Group
Daytona, Florida, United States, 32114
Holy Cross Hospital
Fort Lauderdale, Florida, United States, 33308
NorthFL/South GA VA Health System
Gainesville, Florida, United States, 32608
New Phase Clinical Trials
Miami Beach, Florida, United States, 33140
Mercy Research Institute
Miami, Florida, United States, 33133
University of Miami
Miami, Florida, United States, 33136
Complete Cardiology Care
New Smyrna Beach, Florida, United States, 32169
East Coast Institute for Research
St. Augustine, Florida, United States, 32086
Univeristy of South Florida
Tampa, Florida, United States, 33606
Florida Hospital - Pepin Heart Institute
Tampa, Florida, United States, 33613
United States, Georgia
The Medical Center of Central Georgia
Macon, Georgia, United States, 31201-2102
United States, Illinois
Northwestern University
Chicago, Illinois, United States, 60611
Advocate Medical Group
Park Ridge, Illinois, United States, 60068
United States, Indiana
Premier Healthcare
Bloomington, Indiana, United States, 47403
Northern Indiana Research Alliance
Fort Wayne, Indiana, United States, 46804
Heart Center of Lake County
Merrillville, Indiana, United States, 46410
Medical Consultants, PC
Muncie, Indiana, United States, 47303
United States, Kentucky
Central Baptist Hospital
Lexington, Kentucky, United States, 40503
United States, Louisiana
Innovative Medical Research
Covington, Louisiana, United States, 70433
Heart Clinic of Hammond
Hammond, Louisiana, United States, 70403
Louisiana Heart Center
Slidell, Louisiana, United States, 70433
United States, Maryland
University of Maryland Medical Center
Baltimore, Maryland, United States, 21201
MedStar Health Research Institute
Baltimore, Maryland, United States, 21239
Suburban Hospital - Johns Hopkins Medicine
Bethesda, Maryland, United States, 20814
Woodholme Cardiovacular Associates
Pikesville, Maryland, United States, 21208
Washington Adventist Hospital
Takoma Park, Maryland, United States, 20912
United States, Michigan
McLaren Bay Region
Bay City, Michigan, United States, 48708
DMC Cardiovascular Institute at Harper-Hutzel Hospital
Detroit, Michigan, United States, 48201
Detroit Clinical Research Center
Farmington Hills, Michigan, United States, 48334
Cardiology Consultants of East Michigan
Flint, Michigan, United States, 48532
Genesys Regional Medical Center
Grand Blanc, Michigan, United States, 48439
Spectrum Health
Grand Rapids, Michigan, United States, 49503
Borgess Medical Center
Kalamazoo, Michigan, United States, 49048
Sparrow Clinical Research Institute
Lansing, Michigan, United States, 48912
McLaren Macomb
Mount Clemens, Michigan, United States, 48043
Cardiac & Vascular Research Center of Northern Michigan
Petoskey, Michigan, United States, 49770
United States, Minnesota
Mayo Clinic
Rochester, Minnesota, United States, 55905
United States, New Jersey
Jersey Shore University Medical Center
Neptune, New Jersey, United States, 07754
University of Medicine & Dentistry NJ
New Brunswick, New Jersey, United States, 08901
St. Michael's Medical Center
Newark, New Jersey, United States, 07102
Lourdes Cardiology Services
Voorhees, New Jersey, United States, 08043
United States, New York
Albany Associates in Cardiology
Albany, New York, United States, 12205
SUNY Downstate Medical Center
Brooklyn, New York, United States, 11203
Buffalo Heart Group - Mercy Hospital of Buffalo
Buffalo, New York, United States, 14215
Buffalo Heart Group - Millard Fillmore Gates Circle Hospital
Buffalo, New York, United States, 14215
Columbia University Medical Center
New York, New York, United States, 10032
Stony Brook University Medical Center
Stony Brook, New York, United States, 11794
Cardiology Group of Western New York
Williamsville, New York, United States, 14221
United States, North Carolina
REX Healthcare
Raleigh, North Carolina, United States, 27607
United States, Ohio
Good Samaritan Hospital
Dayton, Ohio, United States, 45406
Cardiovascular Research Center
Toledo, Ohio, United States, 43608
University of Toledo
Toledo, Ohio, United States, 43614
United States, Oklahoma
South Oklahoma Heart Research
Oklahoma City, Oklahoma, United States, 73135
United States, Pennsylvania
Geisinger Medical Center
Danville, Pennsylvania, United States, 17822
Penn State Hershey Medical Center
Hershey, Pennsylvania, United States, 17033
Lancaster General Hospital
Lancaster, Pennsylvania, United States, 17602
St. Mary Medical Center Research Institute
Langhorne, Pennsylvania, United States, 19047
Drexel University College of Medicine
Philadelphia, Pennsylvania, United States, 19102
Allegheny-Singer Research Institute
Pittsburgh, Pennsylvania, United States, 15212
Donald Guthrie Foundation for Education & Research
Sayre, Pennsylvania, United States, 18840
Geisinger Wyoming Valley Heart Hospital
Wilkes-Barre, Pennsylvania, United States, 18711
Cardiac Diagnostic Associates/York Hospital
York, Pennsylvania, United States, 17405
United States, South Carolina
AnMed Health
Anderson, South Carolina, United States, 29621
Greenville Hospital System
Greenville, South Carolina, United States, 29605
United States, Tennessee
Stern Cardiovascular Center
Germantown, Tennessee, United States, 38138
Turkey Creek Medical Center
Knoxville, Tennessee, United States, 37934
St. Thomas Research Institute
Nashville, Tennessee, United States, 37203
United States, Texas
Cardiology Center of Amarillo
Amarillo, Texas, United States, 79106
West Houston Area Clinical Trial Consultants
Houston, Texas, United States, 77008
West Houston Area Clinical Trial Consultants
Houston, Texas, United States, 77094
Scott and White Healthcare
Temple, Texas, United States, 76502
Tyler Cardiovascular Consultants
Tyler, Texas, United States, 75701
United States, Virginia
Cardiology Associates of Fredericksburg
Fredericksburg, Virginia, United States, 22408
Virginia Cardiovascular Associates
Manassas, Virginia, United States, 20109
Riverside Regional Medical Center
Newport News, Virginia, United States, 23601
Sentara Cardiovascular Research Institute
Norfolk, Virginia, United States, 23507
Cardiovascular Associates, Ltd
Virginia Beach, Virginia, United States, 23462
United States, Washington
Swedish Medical Center/Cardiovascular Research
Seattle, Washington, United States, 98122
Sponsors and Collaborators
Angel Medical Systems
Symbios Clinical

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Angel Medical Systems
ClinicalTrials.gov Identifier: NCT00781118     History of Changes
Other Study ID Numbers: ALERTS Study
First Posted: October 28, 2008    Key Record Dates
Last Update Posted: September 28, 2016
Last Verified: September 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: When we have completed review with the FDA, the IPD will will be made available.

Keywords provided by Angel Medical Systems:
Acute Myocardial Infarction (MI)
ST Shift
Coronary Occlusion
Acute Coronary Syndrome

Additional relevant MeSH terms:
Myocardial Infarction
Acute Coronary Syndrome
Coronary Occlusion
Pathologic Processes
Myocardial Ischemia
Heart Diseases
Cardiovascular Diseases
Vascular Diseases
Coronary Disease