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CompletedNCT05126836Updated Dec 15, 2023Results posted

Cilostazol for HFpEF

A Phase 2 interventional study of Cilostazol 100Mg Tab and Placebo in Heart Failure With Preserved Ejection Fraction, sponsored by University of Minnesota. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2023-12-15.

Sponsored by University of Minnesota · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
25
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

Determine if cilostazol improves symptoms and NTproBNP levels (heart failure blood marker) in heart failure with preserved ejection fraction (HFpEF) - a prevalent syndrome without targeted evidence-based treatment.

This will be assessed in a prospective 1-month single blinded study with 2 cross-overs n-of-1 study design with placebo and cilostazol

Read the detailed description

Heart failure (HF) is the #1 reason for hospital admissions. About half of the patients with HF have a preserved ejection fraction (HFpEF). There is no targeted evidence-based treatment for HFpEF. We recently reported that elevating the heart rate with pacemakers conveys clinical benefits e.g. reduction in heart failure symptoms, lowering filling pressures and an increase in walk distance. Cilostazol is a PDE3 inhibitor that increases the heart rate by about 5-8 beats per minute and has other potentially beneficial HFpEF effects such as peripheral vasodilation, lusitropic effects and dromotropic effects. By activating proteinkinase A, cilostazol may also phosphorylate titin, which may reduce myocardial stiffness.

n-of-1 study design using the standard dose cilostazol formulation of 100mg twice a day approved for peripheral vascular disease. The investigators and patients are blinded. The patients serve as their own controls with two crossovers (Week 1: cilostazol or placebo - Week 2: placebo or cilostazol - Week 3: cilostazol or placebo - Week 4: placebo or cilostazol).

02

Conditions studied

  • Heart Failure With Preserved Ejection Fraction

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03

In context

Heart Failure

5,701 studies on the registry are indexed under Heart Failure; 1,220 are open to participants now.

This study's enrollment of 25 is below the median of 72 across 3,736 interventional studies indexed under Heart Failure.

Browse Heart Failure studies →

Lead sponsor

University of Minnesota is the lead sponsor of 1,184 studies on the registry; 195 are open to participants now.

Of its 132 completed or terminated interventional studies of FDA-regulated products, 91 (69%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • >18 yrs
  • LVEF ≥ 50% (on last assessment, \<2 years)
  • Diagnosis of HFpEF or Shortness of breath with NYHA Class ≥ 2 and one of the following:

    1. pulmonary edema on chest imaging or documented on exam or on loop diuretics
    2. NTproBNP >400 ng/ml in the last 24 months
    3. HFpEF>50% hospitalization in the last 3 years
    4. Qualitative echo: > mild diastolic dysfunction on echo report and > mild left ventricular hypertrophy and left atrial dilation or quantitative echo: left ventricular hypertrophy [men ≥115 g/m², women ≥95 g/m² or relative wall thickness >0.42 or any LV wall thickness >1.2cm and has LA dilation (>28ml/m2)

Exclusion criteria

Exclusion Criteria:

  • \<18yo
  • resting heart rate >100/min
  • patients with LVEF \<50%
  • advanced end-stage heart failure,
  • symptomatic COPD on home O2,
  • uncontrolled severe HTN (SBP >160/100 mmHg)
  • patients with life expectancy \<6 months,
  • end-stage liver cirrhosis,
  • more than moderate valve disease,
  • infiltrative myocardial disease
  • constrictive pericarditis or myocarditis,
  • patients unable to participate in follow up,
  • pregnant patients or patients without reliable contraceptive agent for the duration of study participation),
  • left ventricular outflow tract obstruction,
  • bleeding dyscrasias, blood dyscrasias,
  • Patients on oral ketoconazole, itraconazole, fluconazole, miconazole, fluvoxamine, fluoxetine, nefazodone, sertraline, erythromycin, clarithromycin or azithromycin
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
25 participants (actual)

Study arms

  • Other
    Cilostazol

    First week, Cilostazol 100mg twice a day Second week, Placebo twice a day Third week, Cilostazol 100mg twice a day Forth week, Placebo twice a day

    Drug: Cilostazol 100Mg Tab · Drug: Placebo

  • Other
    Placebo

    First week, Placebo twice a day Second week, Cilostazol 100mg twice a day Third week, Placebo twice a day Forth week, Cilostazol 100mg twice a day

    Drug: Cilostazol 100Mg Tab · Drug: Placebo

Interventions

  • DrugCilostazol 100Mg Tab

    Cilostazol Twice a Day

  • DrugPlacebo

    Placebo

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What researchers measure

Primary outcomes

  1. KCCQ-12

    The Kansas City Cardiomyopathy Questionnaire contains 12 items that measure the effect of heart failure on health and quality of life. Total scores are scaled from 0 to 100 and frequently summarized in 25-point ranges, where scores represent health status as follows: 0 to 24: very poor to poor; 25 to 49: poor to fair; 50 to 74: fair to good; and 75 to 100: good to excellent

    Time frame: 4 weeks

Secondary outcomes

  1. NTproBNP

    Blood marker of heart failure severity \[pg/mL\], average of 2 time points 1st and 3rd week

    Time frame: 1st and 3rd week

07

Results

Posted Dec 15, 2023

Participant flow

Participant flow — Overall Study
MilestoneCilostazol First (1 Week), Then Placebo (1 Week)Placebo First, Then Cilostazol
Started1213
Completed1112
Not completed11

Outcome measures

PrimaryKCCQ-12

The Kansas City Cardiomyopathy Questionnaire contains 12 items that measure the effect of heart failure on health and quality of life. Total scores are scaled from 0 to 100 and frequently summarized in 25-point ranges, where scores represent health status as follows: 0 to 24: very poor to poor; 25 to 49: poor to fair; 50 to 74: fair to good; and 75 to 100: good to excellent

Time frame:
4 weeks
Reported as:
Median · units on a scale
KCCQ-12
units on a scaleCilostazolPlacebo
KCCQ-1247 (32 to 52)39 (29 to 48)
SecondaryNTproBNP

Blood marker of heart failure severity \[pg/mL\], average of 2 time points 1st and 3rd week

Time frame:
1st and 3rd week
Reported as:
Median · pg/mL
NTproBNP
pg/mLCilostazolPlacebo
NTproBNP375 (68 to 974)448 (154 to 1056)

Adverse events

Collected over 1 month. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Cilostazol3/23 (13%)3/23 (13%)—
Placebo5/23 (21.7%)5/23 (21.7%)—
Most frequent serious events
Most frequent serious events
EventCilostazolPlacebo
HeadacheGeneral disorders3/232/23
NauseaGeneral disorders3/231/23
edemaGeneral disorders0/232/23
dizzinessGeneral disorders1/230/23

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Cilostazol First, Then PlaceboPlacebo First, Then CilostazolTotal
<=18 years111223
Between 18 and 65 years000
>=65 years000
Sex: Female, Male
Sex: Female, Male(Participants)Cilostazol First, Then PlaceboPlacebo First, Then CilostazolTotal
Female5712
Male6511
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Cilostazol First, Then PlaceboPlacebo First, Then CilostazolTotal
American Indian or Alaska Native000
Asian000
Native Hawaiian or Other Pacific Islander000
Black or African American123
White101020
More than one race000
Unknown or Not Reported000
08

Study locations

1 site
  • M Health Fairview
    Minneapolis, Minnesota 55455, United States
09

References and documents

Study documents

  • Protocol and statistical analysis plan · May 16, 2020
  • Informed consent form · May 16, 2021

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 15, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT05126836
Lead sponsor
University of Minnesota
Responsible party
Sponsor
First posted
Nov 19, 2021
Start date
Sep 1, 2021
Primary completion
Jun 1, 2022
Completion
Jul 1, 2022
Results posted
Dec 15, 2023
Last update
Dec 15, 2023

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Nov 2023. You cannot join it, but the record below documents what was studied.

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