The Diagnostic Benefits of the HyperQTM System in ECG Stress Testing
|ClinicalTrials.gov Identifier: NCT00449579|
Recruitment Status : Unknown
Verified October 2006 by Assuta Hospital Systems.
Recruitment status was: Recruiting
First Posted : March 20, 2007
Last Update Posted : April 17, 2015
The main objective of this study is to determine the usefulness of the HyperQ™ System in improving the positive predictive value of conventional ECG stress testing.
Patients who are referred for stress test will perform an ECG stress test on a treadmill, with high-frequency ECG recording from conventional 12 leads using BSP's HyperQ™ System. Conventional 12 lead ECG, as well as HyperQ™ recordings will be provided by the HyperQ™ System. The results of the conventional test and the HyperQ™ data will be compared, using one of three cardiac tests (stress echocardiography, SPECT myocardial perfusion imaging and angiography) as gold standards.
Statistical analysis will compare the sensitivity, specificity, PPV and NPV of the conventional and HyperQ™ stress ECG in detecting myocardial ischemia.
|Condition or disease||Intervention/treatment||Phase|
|Myocardial Ischemia||Device: Excercise stress test with high frequency ECG recording (HyperQ™ System)||Phase 3|
The study population will comprise of 1200 patients referred to stress test in three Maccabi clinics or cardiac medical centers. All patients will perform an ECG stress test with high-frequency ECG recording from conventional 12 leads using BSP's HyperQ™ System. The recording will be done without affecting or interfering with any aspect of the normal due course of the test. Standard Bruce protocol or modified Bruce protocol will be used, with standard test termination indications. Two minutes of rest ECG will be recorded prior to stating the protocol.
Following the test, the physician will interpret the test's results in the conventional manner (e.g. ST changes, chest pain, etc) and decide whether the subject should be referred to additional tests.
HyperQ™ data will be analyzed in two phases: (i) Interpretation by the physician in a non-blinded manner one day following the stress test and (ii) after performing all the exercise tests of the study group, blindly to the conventional diagnosis and the HyperQ™ analysis done previously, as well as to other outcomes of imaging procedures. The first HyperQ™ reading will be used to detect the subjects who were positive according to the HyperQ™ system but negative according to the conventional stress testing. These subjects will be referred by the physician to further clinical investigation. The first reading will also be used to assess the physician's interpretation in a scenario that represents a realistic clinical setting, while the second reading will be used to examine the unbiased clinical benefit of HyperQ™ data.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||1200 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||The Diagnostic Benefits of the HyperQTM System in ECG Stress Testing|
|Study Start Date :||August 2006|
|Estimated Study Completion Date :||October 2007|
- ST changes
- HyperQ results
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00449579
|Contact: Haim Silber, MD||09 email@example.com|
|Contact: Nechi Almogy, MD||03 firstname.lastname@example.org|
|Dr. Silber Clinic||Recruiting|
|Kfar Saba, Israel|
|Contact: Haim Silber, MD 09 7408811 email@example.com|
|Principal Investigator: Haim Silber, MD|
|Principal Investigator:||Haim Silber, MD||Maccabi Healthcare Services, Israel|