Clinical trial NCT04656366: Results of Coronary Angiography Rafter CABG: Comparison Between No-touch and Conventional Vein Graft
Official title: Coronary Angiographical Results in Patients With Angina After CABG: Comparison Between No-touch and Conventional Vein Graft
Study type: OBSERVATIONAL
Overall status: UNKNOWN
Conditions: Bypass Graft Stenosis
Keywords: vein graft
no-touch
angina
coronary angiography
graft patency
Lead sponsor: Region Örebro County
Sponsor class: OTHER
First posted: 2020-12-07
Enrollment: 1000
Sex: ALL
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: RETROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: All the subjects that previously were operated with a coronary artery bypass grafting at the Cardiothoracic department of the University hospital of Orebro (from1992 until June 30th 2020) and that underwent a percutaneous coronary intervention in a venous graft between January the 1st, 2006 and June the 30th, 2020.

Brief summary: Coronary artery disease is one of the biggest health issue worldwide: It is estimated that cardiovascular diseases cause around 45% of all death in Sweden and in the West World. The treatment, in a large part of the patients, implicates a so called bypass-operation, that consists in to connect new vascular conduits (grafts) beyond the narrowed coronary vessels to improve the blood supply to the heart. One of the graft that is commonly used is the saphenous vein from the leg. The disadvantage of the saphenous vein graft is the predisposition to early obstruction. The international literature shows the following grades of occlusion: 15% in the first year and 40% after 10 years.

At the Cardio-Thoracic Clinic of the University hospital of Örebro has been developed a new method to harvest the saphenous vein together with the surrounding fat-tissue. This technique, called no-touch technique, has the advantage to reduce the damages to the vein during the harvesting, showing a substantially reduced risk for future occlusion (5% after 18 months and 10% after 8,5 years).

2020-05-20 2020-11-16 Project created in: FoU Region Örebro län Resultat av Koronarangiografi hos patienter som tidigare CABG opererats Project number : 274418 Created by: Gabriele Ferrari, 2020-05-20 Last revised by: Gabriele Ferrari, 2020-11-16 Ongoing The aim of the PhD project is to evaluate the results of the no-touch technique in compare to the conventional technique for the venous graft harvesting. The focus of the study is to analyze all the operated patients in our clinic who underwent a post-operative coronary angiography do to angina pectoris (heart pain). One will compare the patency rate, the rate of MACE (major adverse cardiac events) and the quality of life in the two groups (no-touch vs. conventional). This study is the first and the only one in the world that will examine the long-term angiographic results of the no-touch technique in patients that had angina pectoris after the operation.


Eligibility criteria: Inclusion Criteria:

* Angina after CABG requiring diagnostic coronary angiography
* CABG operation between 1992 and June 30th 2020
* Coronary angiography between 2006 and June 30th 2020

Exclusion Criteria:

* Coronary angiography within 30 days from the CABG operation date

Primary outcomes:
measure: Rate of Graft Patency
timeFrame: after the primary CABG (until June the 30th 2020)
Secondary outcomes:
measure: Rate of MACE
timeFrame: after the primary CABG (until June the 30th 2020)
Other outcomes:
Locations:
city: Örebro
country: Sweden
facility: Kärl-Thoraxkliniken; University Hospital of Örebro
Study officials:
References:
citation: Souza D. A new no-touch preparation technique. Technical notes. Scand J Thorac Cardiovasc Surg. 1996;30(1):41-4. doi: 10.3109/14017439609107239. No abstract available.
citation: Souza DS, Dashwood MR, Tsui JC, Filbey D, Bodin L, Johansson B, Borowiec J. Improved patency in vein grafts harvested with surrounding tissue: results of a randomized study using three harvesting techniques. Ann Thorac Surg. 2002 Apr;73(4):1189-95. doi: 10.1016/s0003-4975(02)03425-2.
citation: Souza DS, Johansson B, Bojo L, Karlsson R, Geijer H, Filbey D, Bodin L, Arbeus M, Dashwood MR. Harvesting the saphenous vein with surrounding tissue for CABG provides long-term graft patency comparable to the left internal thoracic artery: results of a randomized longitudinal trial. J Thorac Cardiovasc Surg. 2006 Aug;132(2):373-8. doi: 10.1016/j.jtcvs.2006.04.002.
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citation: Lee MS, Park SJ, Kandzari DE, Kirtane AJ, Fearon WF, Brilakis ES, Vermeersch P, Kim YH, Waksman R, Mehilli J, Mauri L, Stone GW. Saphenous vein graft intervention. JACC Cardiovasc Interv. 2011 Aug;4(8):831-43. doi: 10.1016/j.jcin.2011.05.014.
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