[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100650039":3},{"organization":4,"armGroups":7,"interventions":18,"overallOfficials":10,"centralContacts":24,"locations":32,"responsibleParty":44,"collaborators":10,"id":48,"slug":49,"hasResults":50,"nctId":51,"briefTitle":52,"officialTitle":53,"acronym":10,"eligibilityCriteria":54,"healthyVolunteers":50,"sex":55,"minAge":56,"maxAge":10,"enrollmentInfo":57,"targetDuration":10,"studyType":60,"phases":10,"briefSummary":61,"conditions":62,"keywords":65,"overallStatus":68,"whyStopped":10,"lastUpdateSubmitDate":69,"lastUpdatePostDateStruct":70,"startDateStruct":73,"completionDateStruct":75,"leadSponsor":77,"locationsCount":78},{"fullName":5,"class":6},"Assiut University","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Increased QRS-T Angle",null,"Subjects exhibiting an increased frontal QRS-T angle (≥110° for men, \\>90° for women).",[13],"Diagnostic Test: 12-lead Electrocardiogram (ECG) and Coronary Angiography",{"label":15,"type":10,"description":16,"interventionNames":17},"Normal QRS-T Angle","Subjects presenting with a normative frontal QRS-T angle (\\\u003C110° for men, \\\u003C90° for women).",[13],[19],{"type":20,"name":21,"description":22,"armGroupLabels":23,"otherNames":10},"DIAGNOSTIC_TEST","12-lead Electrocardiogram (ECG) and Coronary Angiography","A 12-lead ECG is performed to calculate the frontal QRS-T angle, and coronary angiography is performed to evaluate the coronary collateral circulation using the Rentrop Classification.",[9,15],[25,30],{"name":26,"role":27,"phone":28,"phoneExt":10,"email":29},"Tarek Yaser","CONTACT","+201005094712","tarek.18313588@med.aun.edu.eg",{"name":31,"role":27,"phone":10,"phoneExt":10,"email":10},"Hosam Hasan",[33],{"facility":34,"status":10,"city":35,"state":10,"zip":10,"country":36,"countryCode":37,"cosmosGeoPoint":38,"geoPoint":43,"contacts":10},"AssiutU","Asyut","Egypt","EG",{"type":39,"coordinates":40},"Point",[41,42],31.18368,27.18096,{"lat":42,"lon":41},{"type":45,"investigatorFullName":46,"investigatorTitle":47,"investigatorAffiliation":5,"oldNameTitle":10,"oldOrganization":10},"PRINCIPAL_INVESTIGATOR","Tarek Yaser Fathi","Resident Physician","100650039","relationship-between-frontal-qrs-t-angle-and-collateral-circulation-in-coronary-artery-chronic-total-occlusion-100650039",false,"NCT07743437","Relationship Between Frontal QRS-T Angle and Collateral Circulation in Coronary Artery Chronic Total Occlusion","Frontal QRS-T Angle as an Electrocardiographic Marker for Collateral Circulation in Coronary Artery Chronic Total Occlusion","Inclusion Criteria:\n\n* Patients undergoing diagnostic coronary angiography due to stable angina persisting for a minimum duration of three months.\n* Patients diagnosed with total occlusion in at least one coronary artery, assessed to have chronic total occlusion (CTO) based on clinical and angiographic findings.\n\nExclusion Criteria:\n\n* Patients presenting with malignancies, atrial fibrillation, connective tissue disorders, hepatic failure, or renal failure.\n* A documented history of cardiac pacemaker implantation, prior bypass surgeries, or surgical valve replacements.\n* Congenital heart anomalies.\n* Patients receiving pharmacological interventions that affect ventricular repolarization (other than beta-adrenergic antagonists).\n* Individuals exhibiting abnormal electrolyte levels at the time of admission.","ALL","18 Years",{"count":58,"type":59},100,"ESTIMATED","OBSERVATIONAL","• Aim of the work: To examine the relationship between collateral circulation and the frontal QRS-T angle in patients with chronic total occlusion (CTO)",[63,64],"Chronic Total Occlusion (CTO)","Frontal QRS-T Angle",[66,67],"frontal QRS-T angle","Chronic total occlusion","NOT_YET_RECRUITING","2026-08-02",{"date":71,"type":72},"2026-08-04","ACTUAL",{"date":74,"type":59},"2026-08",{"date":76,"type":59},"2028-09",{"name":5,"class":6},1]