Viable Myocardium Detected by Hybrid PET/MR and SPECT for the Prediction of the Efficacy of PCI in Patients With CTO.

Chronic Total Occlusion of Coronary Artery Clinical Trial

Official title:

Viable Myocardium Detected by the Combination of Hybrid PET/MR and SPECT Imaging for the Prediction of the Efficacy of PCI in Patients With Chronic Total Occlusion.

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT06113835
• Other study ID #: 022
• Status: Recruiting
• Start date: February 22, 2023
• Est. completion date: March 30, 2025

Study information

• Verified date: October 2023
• Source: The First Affiliated Hospital with Nanjing Medical University
• Contact: Chunjian Li, Dr,PhD
• Phone: +86-13701465229
• Email: drcjli[@]hotmail.com
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

CTO intervention is controversial, and viable myocardium is critical to the improvement of cardiac function and prognosis of patients. However, it remains uncertain whether viable myocardium detected by Hybrid PET/MR and SPECT Imaging improves the PCI efficacy in Patients With CTO.

In this investigator-initiated, prospective, single-center, observational trial, patients meeting the inclusion/exclusion criteria would be assigned to the successful group or the unsuccessful group based on the success of PCI, both undergoing pre-operative and 6-month follow-up Hybrid PET/MR and SPECT imaging. The improvement of left ventricular (LV) recovery after 6 months will be observed.

Description:

Percutaneous coronary intervention (PCI) for chronic total occlusion (CTO) represents a major challenge in interventional cardiology. However, the results of the current large-scale CTO study showed that PCI failed to improve the long-term prognosis (MACE) over medical therapy. Is CTO intervention necessary and how to select appropriate patients for intervention? Previous studies have found the presence and improvement of viable myocardium(VM) in patients with CTO after PCI，and the amount of preoperative VM is critical to the choice of treatment for patients.

Several diagnostic techniques have been introduced to assess myocardial viability and LV recovery, allowing the identification of ischemic myocardium with potentially reversible systolic dysfunction, such as hibernating myocardium, among which 2-deoxy-2-[18F]fluoro-D-glucose positron emission tomography ( 18F-FDG PET) as the "gold standard" for clinical assessment of VM. However, single FDG-PET assessment of VM has limitations and cannot accurately identify hibernating myocardium. 99mTc-Methoxyisobutylisocyanide single-photon emission computed tomography (99mTc-MIBI SPECT), as a validated method for assessing myocardial perfusion, is recommended by guidelines for the assessment of VM in combination with FDG-PET. In recent years, contrast-enhanced cardiac magnetic resonance imaging (cardiac magnetic resonance imaging CMR) has been increasingly used to assess myocardial viability due to its high spatial resolution, which allows the acquisition of cardiac function and myocardial scarring.

However, there are fundamental differences between the two methods in assessing VM and LV function, with LGE-CMR primarily describing an increase in extracellular space associated with scar tissue, whereas FDG-PET uptake represents the true metabolic signals of viable cardiomyocytes. They are complementary.

Hybrid PET/MRI has recently been used as a novel modality for evaluating cardiac diseases, allowing a truly synchronous/simultaneous acquisition of complementary information such as high-resolution anatomy and myocardial metabolism in merged images. However, few studies about PET/MRI were done in patients with CTO.

Our study aims to investigate the effect of CTO-PCI by assessing VM detected by the combination of PET/MR and SPECT and to investigate the predictive value of viable myocardial area on the efficacy of CTO-PCI.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 80
• Est. completion date: March 30, 2025
• Est. primary completion date: October 30, 2024
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 75 Years

Eligibility

Inclusion Criteria:

1. Age ? 18 years, < 75 years;

2. complete occlusion of the coronary artery, confirmed by coronary angiography with TIMI flow grade 0, and occlusion for =3 months;

3. presence of angina or angina-equivalent symptoms ; undergo coronary intervention;

Exclusion Criteria:

1. life expectancy < 1 year due to non-cardiac disease;

2. contraindications to SPECT/PET/MRI: pregnancy, contrast allergy, claustrophobia, history of pacemaker and ICD implantation, other ferromagnetic materials in the body;

3. acute coronary syndrome within the last 3 months;

4. severe valvular heart disease;

5. haemodynamic instability;

6. hepatic or renal insufficiency, with alanine aminotransferase (ALT) > 3 times the upper limit of normal or glomerular filtration rate = 30 mL/min;

7. two or more CTO lesions;

8. previous myocardial infarction.

9. Others who, in the opinion o f the investigator, should not be enrolled;

Related Conditions & MeSH terms

• Chronic Total Occlusion of Coronary Artery

Intervention

Procedure:
• CTO PCI
percutaneous coronary intervention

Locations

Country	Name	City	State
China	First Affiliated Hospital of Nanjing Medical University	Nanjing	Jiangsu

Sponsors (1)

Lead Sponsor	Collaborator
The First Affiliated Hospital with Nanjing Medical University

Country where clinical trial is conducted

China, 

References & Publications (10)

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Azzalini L, Jolicoeur EM, Pighi M, Millan X, Picard F, Tadros VX, Fortier A, L'Allier PL, Ly HQ. Epidemiology, Management Strategies, and Outcomes of Patients With Chronic Total Coronary Occlusion. Am J Cardiol. 2016 Oct 15;118(8):1128-1135. doi: 10.1016/j.amjcard.2016.07.023. Epub 2016 Jul 28. — View Citation

Dilsizian V, Bacharach SL, Beanlands RS, Bergmann SR, Delbeke D, Dorbala S, Gropler RJ, Knuuti J, Schelbert HR, Travin MI. ASNC imaging guidelines/SNMMI procedure standard for positron emission tomography (PET) nuclear cardiology procedures. J Nucl Cardiol. 2016 Oct;23(5):1187-1226. doi: 10.1007/s12350-016-0522-3. Epub 2016 Jul 8. No abstract available. Erratum In: J Nucl Cardiol. 2023 Oct;30(5):2186. — View Citation

Hamzaraj K, Kammerlander A, Gyongyosi M, Frey B, Distelmaier K, Graf S. Patient Selection and Clinical Indication for Chronic Total Occlusion Revascularization-A Workflow Focusing on Non-Invasive Cardiac Imaging. Life (Basel). 2022 Dec 20;13(1):4. doi: 10.3390/life13010004. — View Citation

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. — View Citation

Kwong RY, Chan AK, Brown KA, Chan CW, Reynolds HG, Tsang S, Davis RB. Impact of unrecognized myocardial scar detected by cardiac magnetic resonance imaging on event-free survival in patients presenting with signs or symptoms of coronary artery disease. Circulation. 2006 Jun 13;113(23):2733-43. doi: 10.1161/CIRCULATIONAHA.105.570648. Epub 2006 Jun 5. Erratum In: Circulation. 2006 Aug 22;114(8):e365. — View Citation

Ling LF, Marwick TH, Flores DR, Jaber WA, Brunken RC, Cerqueira MD, Hachamovitch R. Identification of therapeutic benefit from revascularization in patients with left ventricular systolic dysfunction: inducible ischemia versus hibernating myocardium. Circ Cardiovasc Imaging. 2013 May 1;6(3):363-72. doi: 10.1161/CIRCIMAGING.112.000138. Epub 2013 Apr 17. — View Citation

Mehran R, Claessen BE, Godino C, Dangas GD, Obunai K, Kanwal S, Carlino M, Henriques JP, Di Mario C, Kim YH, Park SJ, Stone GW, Leon MB, Moses JW, Colombo A; Multinational Chronic Total Occlusion Registry. Long-term outcome of percutaneous coronary intervention for chronic total occlusions. JACC Cardiovasc Interv. 2011 Sep;4(9):952-61. doi: 10.1016/j.jcin.2011.03.021. — View Citation

Ryan M, Morgan H, Chiribiri A, Nagel E, Cleland J, Perera D. Myocardial viability testing: all STICHed up, or about to be REVIVED? Eur Heart J. 2022 Jan 13;43(2):118-126. doi: 10.1093/eurheartj/ehab729. — View Citation

Vitadello T, Kunze KP, Nekolla SG, Langwieser N, Bradaric C, Weis F, Cassese S, Fusaro M, Hapfelmeier A, Lewalter T, Schwaiger M, Kastrati A, Laugwitz KL, Rischpler C, Ibrahim T. Hybrid PET/MR imaging for the prediction of left ventricular recovery after percutaneous revascularisation of coronary chronic total occlusions. Eur J Nucl Med Mol Imaging. 2020 Dec;47(13):3074-3083. doi: 10.1007/s00259-020-04877-w. Epub 2020 May 30. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	left ventricular ejection fraction increased by =5%	PET/MR postoperative follow-up	6±1 month
Primary	Segmental ventricular wall motion score decreased by =1	PET/MR postoperative follow-up	6±1 month