Investigating the Utility of Remote Index of Microvascular Resistance in Patients With Chronic Total Occlusion

NCT04226326 | Completed

• 1 other identifier: IRB19-0654
• Study Type: interventional
• Target: 4
• Locations: 1 country
• Sites: 1

Brief Summary

This is prospective cohort study in subjects with a planned percutaneous coronary intervention (PCI) of their chronic total occlusion (CTO). The study will enroll subjects who have been scheduled for a clinically-indicated cardiac catheterization, and will evaluate coronary microvascular function in all subjects meeting inclusion criteria with a coronary flow wire. Evaluation of coronary microvascular function may be performed using indirect methods, however the rationale behind the present study is to directly measure microvascular function using direct coronary flow measurements, since the subjects in the study are to undergo a clinically-indicated cardiac catheterization. The overall purpose of the study is to define the presence and severity of coronary microvascular dysfunction subjects with CTO. The study is designed to enroll 50 subjects with CTO in the span of 3 years. There will be a 6-month assessment of the outcomes of death and cardiovascular death. As the study includes FDA approved tests, there will be no safety endpoint per se, however there will be a mechanism for monitoring adverse events as will be described in detail.

Conditions

Chronic Total Occlusion

Keywords

Microvascular Resistance; Percutaneous Coronary Intervention

Outcome Measures

Primary Outcomes (4)

• Baseline myocardial quality of the CTO-supplied vascular bed.

  Characterize the microvascular resistance of the donor vessel to 50 CTOs as it relates to vascular bed quality of the CTO-supplied territory. Scaled from 0-102, with 102 being worse than 0. 1\. Baseline myocardial quality

  Day of procedure

• IMR of opened CTO vessel

  Following CTO PCI, IMR of the opened vessel will be measured. Scale is linear and 1-100 units, higher numbers being worse outcome. 3\) Change in SAQ from baseline to 6 months

  6 months

• Change in exercise time on Bruce protocol baseline

  Change in exercise time from baseline to 6 months post-PCI will be measured. Scale is linear and measured in seconds (can be a negative number), with higher numbers indicating a favorable outcome.

  6 months

• Change in SAQ from baseline to 6 months

  Change in Seattle Angina Questionnaire (SAQ) from baseline to 6 months post-PCI will be measured. Scale is linear and 0-100 units, with higher numbers indicating a favorable outcome.

  6 months

Study Arms (1)

Subjects with Chronic Total Occlusion (CTO)

OTHER

All subjects in this study have been scheduled for a clinically-indicated cardiac catheterization.

Other: Directly measure microvascular function using direct coronary flow measurements

Interventions

Directly measure microvascular function using direct coronary flow measurements OTHER

The study will enroll subjects who have been scheduled for a clinically-indicated cardiac catheterization, and will evaluate coronary microvascular function in all subjects meeting inclusion criteria with a coronary flow wire. Evaluation of coronary microvascular function may be performed using indirect methods, however the rationale behind the present study is to directly measure microvascular function using direct coronary flow measurements, since the subjects in the study are to undergo a clinically-indicated cardiac catheterization. The overall purpose of the study is to define the presence and severity of coronary microvascular dysfunction subjects with CTO.

Subjects with Chronic Total Occlusion (CTO)

Eligibility Criteria

• Age: 21 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• age ≥ 21 years
• seen at University of Chicago Medical center with a planned PCI of a single CTO vessel
• must have either stable angina or angina equivalent
• must have a CTO with a clear donor vessel supplying most of the collaterals.

You may not qualify if:

• subjects with a pacemaker or implantable cardioverter defibrillator
• contraindication to cardiac MRI, adenosine, heparin, or nitroglycerin
• cardiac transplantation
• Estimated glomerular filtration rate (eGFR) ≤ 30 mL/min/1.73m2, given the risk of contrast-induced nephropathy (CIN) and nephrogenic systemic fibrosis (NSF) associated with iodinated and gadolinium-based contrast agents, respectively, in patients with significant renal dysfunction
• Women who may potentially be pregnant will receive a pregnancy test and be excluded if pregnant
• Vulnerable populations such as children, college students, prisoners, non-English speakers, and those with diminished decision-making capacity
• Inability or refusal to consent for the study.

Sponsors & Collaborators

• University of Chicago: lead

Study Sites (1)

University of Chicago Medical Center

Chicago, Illinois, 60637, United States

Location

Related Publications (10)

• Writing Group Members; Mozaffarian D, Benjamin EJ, Go AS, Arnett DK, Blaha MJ, Cushman M, Das SR, de Ferranti S, Despres JP, Fullerton HJ, Howard VJ, Huffman MD, Isasi CR, Jimenez MC, Judd SE, Kissela BM, Lichtman JH, Lisabeth LD, Liu S, Mackey RH, Magid DJ, McGuire DK, Mohler ER 3rd, Moy CS, Muntner P, Mussolino ME, Nasir K, Neumar RW, Nichol G, Palaniappan L, Pandey DK, Reeves MJ, Rodriguez CJ, Rosamond W, Sorlie PD, Stein J, Towfighi A, Turan TN, Virani SS, Woo D, Yeh RW, Turner MB; American Heart Association Statistics Committee; Stroke Statistics Subcommittee. Heart Disease and Stroke Statistics-2016 Update: A Report From the American Heart Association. Circulation. 2016 Jan 26;133(4):e38-360. doi: 10.1161/CIR.0000000000000350. Epub 2015 Dec 16. No abstract available.

  PMID: 26673558 BACKGROUND

• Ramunddal T, Hoebers LP, Henriques JP, Dworeck C, Angeras O, Odenstedt J, Ioanes D, Olivecrona G, Harnek J, Jensen U, Aasa M, Jussila R, James S, Lagerqvist B, Matejka G, Albertsson P, Omerovic E. Chronic total occlusions in Sweden--a report from the Swedish Coronary Angiography and Angioplasty Registry (SCAAR). PLoS One. 2014 Aug 12;9(8):e103850. doi: 10.1371/journal.pone.0103850. eCollection 2014.

  PMID: 25117457 BACKGROUND

• Fefer P, Knudtson ML, Cheema AN, Galbraith PD, Osherov AB, Yalonetsky S, Gannot S, Samuel M, Weisbrod M, Bierstone D, Sparkes JD, Wright GA, Strauss BH. Current perspectives on coronary chronic total occlusions: the Canadian Multicenter Chronic Total Occlusions Registry. J Am Coll Cardiol. 2012 Mar 13;59(11):991-7. doi: 10.1016/j.jacc.2011.12.007.

  PMID: 22402070 BACKGROUND

• Claessen BE, van der Schaaf RJ, Verouden NJ, Stegenga NK, Engstrom AE, Sjauw KD, Kikkert WJ, Vis MM, Baan J Jr, Koch KT, de Winter RJ, Tijssen JG, Piek JJ, Henriques JP. Evaluation of the effect of a concurrent chronic total occlusion on long-term mortality and left ventricular function in patients after primary percutaneous coronary intervention. JACC Cardiovasc Interv. 2009 Nov;2(11):1128-34. doi: 10.1016/j.jcin.2009.08.024.

  PMID: 19926056 BACKGROUND

• Puma JA, Sketch MH Jr, Tcheng JE, Gardner LH, Nelson CL, Phillips HR, Stack RS, Califf RM. The natural history of single-vessel chronic coronary occlusion: a 25-year experience. Am Heart J. 1997 Apr;133(4):393-9. doi: 10.1016/s0002-8703(97)70179-0.

  PMID: 9124159 BACKGROUND

• Farooq V, Serruys PW, Garcia-Garcia HM, Zhang Y, Bourantas CV, Holmes DR, Mack M, Feldman T, Morice MC, Stahle E, James S, Colombo A, Diletti R, Papafaklis MI, de Vries T, Morel MA, van Es GA, Mohr FW, Dawkins KD, Kappetein AP, Sianos G, Boersma E. The negative impact of incomplete angiographic revascularization on clinical outcomes and its association with total occlusions: the SYNTAX (Synergy Between Percutaneous Coronary Intervention with Taxus and Cardiac Surgery) trial. J Am Coll Cardiol. 2013 Jan 22;61(3):282-94. doi: 10.1016/j.jacc.2012.10.017. Epub 2012 Dec 19.

  PMID: 23265332 BACKGROUND

• Christofferson RD, Lehmann KG, Martin GV, Every N, Caldwell JH, Kapadia SR. Effect of chronic total coronary occlusion on treatment strategy. Am J Cardiol. 2005 May 1;95(9):1088-91. doi: 10.1016/j.amjcard.2004.12.065.

  PMID: 15842978 BACKGROUND

• Bagnall A, Spyridopoulos I. The evidence base for revascularisation of chronic total occlusions. Curr Cardiol Rev. 2014 May;10(2):88-98. doi: 10.2174/1573403x10666140331125659.

  PMID: 24694105 BACKGROUND

• Brilakis ES, Banerjee S, Karmpaliotis D, Lombardi WL, Tsai TT, Shunk KA, Kennedy KF, Spertus JA, Holmes DR Jr, Grantham JA. Procedural outcomes of chronic total occlusion percutaneous coronary intervention: a report from the NCDR (National Cardiovascular Data Registry). JACC Cardiovasc Interv. 2015 Feb;8(2):245-253. doi: 10.1016/j.jcin.2014.08.014.

  PMID: 25700746 BACKGROUND

• Henriques JP, Hoebers LP, Ramunddal T, Laanmets P, Eriksen E, Bax M, Ioanes D, Suttorp MJ, Strauss BH, Barbato E, Nijveldt R, van Rossum AC, Marques KM, Elias J, van Dongen IM, Claessen BE, Tijssen JG, van der Schaaf RJ; EXPLORE Trial Investigators. Percutaneous Intervention for Concurrent Chronic Total Occlusions in Patients With STEMI: The EXPLORE Trial. J Am Coll Cardiol. 2016 Oct 11;68(15):1622-1632. doi: 10.1016/j.jacc.2016.07.744.

  PMID: 27712774 BACKGROUND

Study Officials

• John Blair, MD

  University of Chicago

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: DIAGNOSTIC
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: December 18, 2019
• First Posted: January 13, 2020
• Study Start: January 15, 2020
• Primary Completion: July 17, 2023
• Study Completion: July 17, 2023
• Last Updated: August 24, 2023

Record last verified: 2023-08

Locations

US (1)