Effects of Low Frequency Magnetic Field on Exercise Induced Angina
The investigators have previously shown that a frequency of 15.95-16.00 Hz protects against acute myocardial infarction in rats. In the current study the investigators would like to investigate whether this frequency enables cardiac patients with exercise-induced chest pain to exercise at higher workload and heart rate. Therefore, patients will undergo two exercise stress tests, one test after being exposed to 30 minutes of the above mentioned frequency and another test after being exposed to sham (no frequency is turned ON). The investigators will measure changes in the electrocardiogram (ECG), workload, exercise time, and subjective measure of chest pain (angina).
Angina Exacerbation Acute
|Study Design:||Observational Model: Case Control
Time Perspective: Prospective
|Official Title:||Effects of Low Frequency Electromagnetic Field on Patients With Exercise Induced Angina|
- Exercise workload for a given ECG change [ Time Frame: within a month from the second exercise stress test ] [ Designated as safety issue: No ]Exercise workload wil be compared between the two tests and according with the ECG changes recorded at these two tests.
- Angina scale [ Time Frame: Within a month from the last exercise stress test ] [ Designated as safety issue: No ]Define the angina scale obtained between the two tests at a given workload.
|Study Start Date:||November 2011|
|Estimated Study Completion Date:||October 2012|
|Estimated Primary Completion Date:||May 2012 (Final data collection date for primary outcome measure)|
Frequency exposed patients
Patients exposed to the magnetic field with the specific frequency
Several studies have shown that low frequency electromagnetic field has biological and therapeutic potential on the human body, however, to very limited extent on the heart. In the current study cardiac patients suffering from exercise-induced-angina will undergo two consecutive stress tests, one test after being exposed for 30 minutes to the magnetic field and the other test after being exposed to placebo (magnetic field not operated). The order of which the magnet will be operated will be randomly assigned for the patients so a group of patients will be exposed to the magnetic field at their first stress test and another groups of patients will be exposed to the magnetic field at their second stress test. During resting period, and while the patients are subjected to the magnetic field, a 12 lead electrocardiogram (ECG) will be monitored. Thereafter the magnetic field and frequency will be turned off and the patients will be subjected to graded exercise stress test during which they will be monitored for ECG and blood pressure changes. Similar monitoring will be documented during the recovery period following the stress test. In addition, the patients will grade their angina score as documented during the stress test. The data will be compared between the two stress tests and to document any advantageous of the magnetic field on exercise time, workload, ECG changes and/or chest pain.
|Contact: Robert Klempner, MD||972-3-5302361||Robert.Klemper@sheba.health.gov.il|
|Cardiac Rehabilitation Institute, sheba Medical Center||Not yet recruiting|
|Tel-Hashomer, Israel, 52621|
|Contact: Robert Klemper, MD 972-3-5302361 Robert.Klemper@sheba.health.gov.il|
|Sub-Investigator: Robert Klemper, MD|
|Principal Investigator: Ilan Hay, MD|
|Principal Investigator:||Ilan Hai, MD||Cardiac Rehabilitation Institute, Sheba Medical Center|