Clinical trial NCT03923530: Pressure Assessment to Improve Outcomes After TAVR: a Registry
Official title: Pressure Assessment to Improve Outcomes After TAVR: a Registry
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: EARLY_PHASE1
Conditions: Hypertension
Aortic Stenosis, Calcific
Quality of Life
Heart Failure With Preserved Ejection Fraction
Keywords: TAVR
KCCQ
Aortic stenosis
Diastolic dysfunction
Invasive hemodynamic assessment
Lead sponsor: North Florida Foundation for Research and Education
Sponsor class: OTHER
Collaborators: name: Malcom Randall VA Medical Center
First posted: 2019-04-22
Enrollment: 12
Sex: ALL
Minimum age (years): 55
Maximum age (years): 100
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: Enroll subjects who underwent TAVR and had documentation of abnormal invasive cardiac hemodynamics.
Primary purpose: TREATMENT

Brief summary: At the Malcom Randall Veterans Affairs Medical Center (MRVAMC), invasive cardiac pressures are routinely recorded after transcatheter aortic valve replacement (TAVR) procedures. Our research has disclosed that patients with abnormal hemodynamics (narrow aortic to ventricular end-diastolic pressure difference, indexed to heart rate) suffer from high long-term mortality, compared with patients with normal hemodynamics.This hemodynamic value can be referred to as the aortoventricular index (AVi). Hypertension and diastolic dysfunction are highly co-morbid conditions among these patients. The selective aldosterone receptor antagonist eplerenone (Inspra) is approved for use in the treatment of hypertension. Research also supports that eplerenone may be able to improve diastolic function.

This prospective study is interested in determining 1) the tolerability of eplerenone, and 2) feasibility of administering the Kansas City Cardiomyopathy Questionnaire (KCCQ-12) among subject with abnormal cardiac hemodynamics after TAVR. This study will set the stage for a pilot randomized trial to evaluate eplerenone versus placebo among patients with abnormal hemodynamics after TAVR.

Detailed description: Our research has disclosed that patients who have abnormal invasive cardiac hemodynamics (narrow aortic to ventricular end-diastolic pressure difference, indexed to heart rate) after TAVR suffer from poor long-term survival. This hemodynamic value can be referred to as the aortoventricular index (AVi). In a single center observational study, the 2-year mortality rate for patient with a value ≥0.6 mm Hg/bpm was 25% compared with 36% for patients with a value \<0.6 mm Hg/bpm. An abnormal AVi was an independent predictor for poor survival. Hypertension and diastolic dysfunction are 2 highly co-morbid conditions among these patients. Currently, there is lack of appreciation that pressure measurements obtained at the time of TAVR can provide long-term prognostic value. There is also a lack of understanding on how to improve outcomes and quality of life among such patients.

Eplerenone is a selective aldosterone receptor antagonist approved for use for treatment of hypertension. Animal studies have shown that aldosterone receptor antagonists can decrease interstitial myocardial fibrosis. The non-selective aldosterone receptor antagonist, spironolactone 25 mg daily compared with placebo was shown to improve diastolic function, as assessed by echocardiography, among 28 elderly subjects. A meta-analysis of eleven studies in 942 subjects found that aldosterone receptor antagonists improve diastolic function and markers of cardiac fibrosis without significant changes to left ventricular mass or dimensions. In a randomized controlled trial, eplerenone was found to be safely tolerated among asymptomatic patients with moderate to severe aortic stenosis.

Eligibility criteria: 1. Enroll 10 subjects with hypertension and abnormal hemodynamics after TAVR.
2. This is a greater than minimal risk study.

   1. Inclusion criteria:

      * TAVR procedure performed at the Malcom Randall VA Medical Center within the last 2 years.
      * Intracardiac pressures recorded 5 to 10 minutes after TAVR and AVi \< 0.6 mm Hg/bpm.
      * History of hypertension, taking anti-hypertensive medications, or recent systolic blood pressure ≥130 mm Hg.
   2. Exclusion criteria:

      * Serum potassium \>5.5 mEq/L at initiation.
      * Concomitant administration of strong CYP3A inhibitor (i.e. ketoconazole, itraconazole, nefazodone, troleandomycin, clarithromycin, ritonavir, and nelfinavir).
      * Type 2 diabetes with microalbuminuria.
      * Serum creatinine \>2.0 for men and \>1.8 for women.
      * Creatinine clearance \<50 cc/min.
      * Concomitant administration of potassium supplements or potassium-sparing diuretics.
3. Subjects who are eligible to participate and signed an informed consent will be given eplerenone 50 mg daily. Study drug (eplerenone) will be paid by the North Florida Foundation for Research and Education for the duration of the study.

   a. Down-titration or termination of non-essential anti-hypertensive agents is permissible so that eplerenone does not result in hypotension. Essential medications are as follows:
   * Angiotensin converting enzyme inhibitors (ACE-inhibitors) or angiotensin receptor blockers, if intolerant to ACE-inhibitors are indicated for treatment left ventricular dysfunction (i.e. left ventricular ejection fraction ≤40%), diabetes, and proteinuric chronic kidney disease.
   * Beta-blockers are indicated 3 years after an acute myocardial infarction, unless there is persistent left ventricular dysfunction (i.e. left ventricular ejection fraction ≤40%).
4. Monitoring.

   a. Serum potassium within the last 30 days is required before initiating eplerenone. Repeat blood draw is required within the first week, and one month after the start of treatment with eplerenone.
5. Quality of life questionnaire. a. The Kansas City Cardiomyopathy Questionnaire (KCCQ-12) will be administered at baseline and 8 weeks. The KCCQ-12 instrument will be mailed to the subject. Study coordinator will call the subject at 8 weeks to confirm vital status, assess if any adverse reactions from eplerenone, and provide assistance to completing the KCCQ-12, if needed.

Primary outcomes:
measure: Kansas City Cardiomyopathy Questionnaire (KCCQ-12)-Summary Score
timeFrame: Baseline, 8 weeks
Secondary outcomes:
measure: Kansas City Cardiomyopathy Questionnaire (KCCQ-12)-Physical Limitation Score
timeFrame: Baseline, 8 weeks
measure: Kansas City Cardiomyopathy Questionnaire (KCCQ-12)-Symptom Frequency Score
timeFrame: Baseline, 8 weeks
measure: Kansas City Cardiomyopathy Questionnaire (KCCQ-12)-Quality of Life Score
timeFrame: Baseline, 8 weeks
measure: Kansas City Cardiomyopathy Questionnaire (KCCQ-12)-Social Limitation Score
timeFrame: Baseline, 8 weeks
measure: Systolic Blood Pressure
timeFrame: Baseline, 8 weeks
measure: Diastolic Blood Pressure
timeFrame: Baseline, 8 weeks
Other outcomes:
Locations:
city: Gainesville
country: United States
facility: Malcom Randall VA Medical Center
state: Florida
Study officials:
affiliation: University of Florida
name: Anthony Bavry, MD
role: PRINCIPAL_INVESTIGATOR
References: