Clinical trial NCT01342029: Treatment With Ranolazine in Microvascular Coronary Dysfunction (MCD): Impact on Angina Myocardial Ischemia
Official title: Treatment With Ranolazine in Microvascular Coronary Dysfunction (MCD): Impact on Angina Myocardial Ischemia
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Microvascular Coronary Dysfunction (MCD)
Keywords: Microvascular Coronary Dysfunction (MCD)
Lead sponsor: Cedars-Sinai Medical Center
Sponsor class: OTHER
Collaborators: name: University of Florida
First posted: 2011-04-26
Enrollment: 142
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: TREATMENT

Brief summary: This research study is designed to test the use of ranolazine in patients with angina (chest discomfort due to reduced blood supply to the heart) due to microvascular coronary dysfunction (MCD; abnormalities in the small blood vessels of the heart). This drug is approved by the U.S. Food and Drug Administration (FDA) for treatment of chronic angina. The FDA has approved this drug based on studies primarily on patients with chronic angina with major blockages of the arteries.

Detailed description: This is a randomized, double-blinded, placebo- controlled, and cross-over clinical trial. 147 subjects will be enrolled at two clinical sites, with projected 9-10% dropout and anticipated 134 completed subjects. To maintain blinding of the investigators, the study randomization table will be kept in Pharmacy Service. The sponsor will ship the study drug directly to the Pharmacy Service. The pharmacy service will also be responsible for dispersing the study drug.

There are 4 study visits (2 visits in each study period) in this study. Subjects will be in this study for about 6 weeks from Week 0 - baseline visit to Week 6 - exit visit. Besides the procedure of study medication mentioned above, other study procedures include informed consent, physical exam, questionnaires, EKG for safety assessment, blood collection for laboratory testing, cardiac MRI, and follow-up events. In sum, participants will be asked to undergo 2 cardiac MRI's and fill out questionnaires 4 times. They will be asked to participate for 6 weeks with two 2-week courses (with a treatment window period of 5 days), one with ranolazine and the other with placebo (without knowing which they are taking). There is a 2-week washout period between treatments. The participants will otherwise remain on all their usual medications. The physicians will also be blinded to which medication the subject is receiving.

Participation in this study will be approximately 6 weeks, which consists of two 2-week study periods and in between a 2-week washout period:

1. During the first 2-week period: Subjects will be randomized to first receive either the ranolazine or a placebo pill (sugar pill with no active medicine). Subjects will take the extended-release ranolazine or a placebo pill for a total of 2 weeks. Subjects will take 500 mg twice daily for the first 1 week and then 1000 mg twice daily for an additional 1 week. Subjects who are unable to take the higher dose due to side effects will remain on 500 mg twice daily for the entire study period. After the 2 weeks, the participant will have a Cardiac MRI and complete study questionnaires. These tools will allow us to evaluate if the participant is doing better on the medication.
2. 2-week washout period: Subject will then be asked to go 2 weeks without any study medication (ranolazine or placebo).
3. During the second 2-week period: Subject will then be given either extended release ranolazine or placebo depending on which was received the first time for a total of 2 weeks. Subjects will take 500 mg twice daily for the first 1 week and then 1000 mg twice daily for an additional 1 week. Subjects who are unable to take the higher dose due to side effects will remain on 500 mg twice daily for entire study period. This 2-week period will again be followed by a final Cardiac MRI and questionnaire completion.

Eligibility criteria: Inclusion Criteria:

1. Men or women age \>18 from diverse racial/ethnic groups;
2. Competent to give informed consent;
3. Patients with chronic angina or its equivalent;
4. Coronary angiogram revealing MCD with no obstructive CAD (epicardial coronary stenosis \<50% luminal diameter stenosis);
5. Left ventricular ejection fraction \> or = 45%;
6. Objective evidence of ischemia by noninvasive methods such as exercise stress test, stress Echo, MRI, or SPECT;
7. Patients with 10% myocardial ischemia by Cardiac magnetic resonance imaging (CMRI) myocardial perfusion reserve index ≤ 2.0 or abnormal coronary reactivity testing (CFR \< 2.5, or ACH response of no dilation or constriction, determined by local site read).

Exclusion Criteria:

1. Acute coronary syndrome (defined by WHO), cardiogenic shock or requiring inotropic or intra-aortic balloon support;
2. Planned percutaneous coronary intervention or CABG or established obstructive CAD with ischemia eligible for revascularization, acute MI;
3. Prior non-cardiac illness with an estimated life expectancy \<4 years;
4. Unable to give informed consent;
5. Allergy or contra-indication to CMRI testing, including renal failure, claustrophobia, and asthma, uncontrolled moderate hypertension (sitting blood pressure \>160/95mmHg with measurements recorded on at least 2 occasions), conditions likely to influence outcomes: Severe lung, creatinine \>1.8 or CrCl ≤ 50ml/min) or hepatic disease;
6. Surgically uncorrected significant congenital or valvular heart disease and other disease likely to be fatal or require frequent hospitalization within the next six months;
7. Adherence or retention reasons;
8. Unwilling to complete follow-up evaluation including repeat testing, documented obstructive hypertrophic cardiomyopathy;
9. Aortic stenosis (valve area \<1.5cm);
10. LV dysfunction (ejection fraction ≤35%);
11. History of significant cocaine or amphetamine abuse;
12. Taking potent CYP3A4 inhibitors (ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir, nelfinavir);
13. Women who are pregnant.

Primary outcomes:
measure: Seattle Angina Questionnaire (SAQ)
timeFrame: 2 weeks (first intervention) and 6 weeks (second intervention)
Secondary outcomes:
measure: Cardiac Magnetic Resonance (CMRs)
timeFrame: 2 weeks (first intervention) and 6 weeks (second intervention)
Other outcomes:
Locations:
city: Los Angeles
country: United States
facility: 127 S. San Vicente Blvd, Suite A9303
state: California
city: Gainesville
country: United States
facility: University of Florida
state: Florida
Study officials:
affiliation: Cedars-Sinai Medical Center
name: C. Noel Bairey Merz, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Rambarat CA, Elgendy IY, Handberg EM, Bairey Merz CN, Wei J, Minissian MB, Nelson MD, Thomson LEJ, Berman DS, Shaw LJ, Cook-Wiens G, Pepine CJ. Late sodium channel blockade improves angina and myocardial perfusion in patients with severe coronary microvascular dysfunction: Women's Ischemia Syndrome Evaluation-Coronary Vascular Dysfunction ancillary study. Int J Cardiol. 2019 Feb 1;276:8-13. doi: 10.1016/j.ijcard.2018.09.081. Epub 2018 Sep 26.
citation: Birkeland K, Khandwalla RM, Kedan I, Shufelt CL, Mehta PK, Minissian MB, Wei J, Handberg EM, Thomson LE, Berman DS, Petersen JW, Anderson RD, Cook-Wiens G, Pepine CJ, Bairey Merz CN. Daily Activity Measured With Wearable Technology as a Novel Measurement of Treatment Effect in Patients With Coronary Microvascular Dysfunction: Substudy of a Randomized Controlled Crossover Trial. JMIR Res Protoc. 2017 Dec 20;6(12):e255. doi: 10.2196/resprot.8057.
citation: Bairey Merz CN, Handberg EM, Shufelt CL, Mehta PK, Minissian MB, Wei J, Thomson LE, Berman DS, Shaw LJ, Petersen JW, Brown GH, Anderson RD, Shuster JJ, Cook-Wiens G, Rogatko A, Pepine CJ. A randomized, placebo-controlled trial of late Na current inhibition (ranolazine) in coronary microvascular dysfunction (CMD): impact on angina and myocardial perfusion reserve. Eur Heart J. 2016 May 14;37(19):1504-13. doi: 10.1093/eurheartj/ehv647. Epub 2015 Nov 27.