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Cardiogenic ShockPhase 2SEISMiCNCT04325035

The Safety and Efficacy of Istaroxime for Pre-Cardiogenic Shock

A Phase 2 study testing Istaroxime in people with Cardiogenic Shock, run by Windtree Therapeutics at 13 sites in 4 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This is a pilot, multinational, randomized, double-blind, placebo-controlled, 2-part safety and efficacy study. Subjects will consist of patients hospitalized for acute decompensated heart failure with persistent hypotension. Read more about this study

Who is it for?
Ages 18 to 85 years
Conditions the study is for
Cardiogenic Shock
What is being tested?
Istaroxime
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
90 participants
Where
13 sitesin 4 countries
Study dates
28 Sep 2020to 30 Oct 2024
Phase
Phase 2
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 85 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Clinical presentation consistent with SCAI Stage B pre-cardiogenic shock caused by acute decompensation of chronic systolic heart failure (due to arterial hypertension, ischemic heart disease or dilated cardiomyopathy), without evidence for an acute coronary syndrome.
  • Signed informed consent form (ICF);
  • Males and females, 18 to 85 years of age (inclusive);
  • An admission for acute decompensated heart failure (ADHF) episode within 36 hours prior to randomization, defined as:
  • Dyspnea, at rest or with minimal exertion;
  • Congestion on chest x-ray or lung US with B-type natriuretic peptide (BNP) ≥ 400 pg/mL or NT-proBNP ≥ 1400 pg/mL; Elective admissions for medications tune up or procedures do not qualify as an ADHF admission.
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  • History of left ventricular ejection fraction (LVEF) ≤ 40%;
  • Persistent hypotension defined as:
  • SBP of 75 to 90 mmHg (Part A) or 70 to 100 mmHg (Part B) for ≥ 2 hours prior to Screening;
  • SBP does not decrease by > 7 mmHg on two separate measurements during the last 2 hours prior to randomization;
  • Heart rate 75 to 150 bpm. If the subject is on a beta-blocker, the range is 60 to 150 bpm;
  • Echocardiogram during initial hospitalization confirming ejection fraction ≤ 40% and no evidence of other pathology to confound interpretation of cardiac physiology (e.g., pericardial effusion);
  • Subject is monitored by a Pulmonary Artery Catheter (PAC) at the time of randomization (Part B only).

Who cannot join

  • Cardiogenic shock of SCAI Stage C or worse
  • Cardiogenic shock due to any other condition besides acute decompensation of chronic heart failure.
  • Any of the following in the past 30 days: acute coronary syndrome, coronary revascularization, myocardial infarction (MI), coronary artery bypass graft (CABG), or percutaneous coronary intervention;
  • Current (within 6 hours of Screening) or anticipated need for treatment with positive inotropic agents or vasopressors, renal support including ultrafiltration, or mechanical circulatory, ventilatory or renal support (intra-aortic balloon pump, endotracheal intubation, mechanical ventilation, or any ventricular assist device);
  • Venous Lactate > 2 mmol/L;
  • History of heart transplant or United Network for Organ Sharing (UNOS) priority 1a heart transplant listing
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  • Ongoing treatment with digoxin (if digoxin was stopped before signing the ICF and the digoxin plasma level is < 0.5 ng/ml, the patient may be enrolled);
  • Severe renal impairment (estimated glomerular filtration rate (eGFR) < 30 ml/min, calculated by the Modification of Diet in Renal Disease (MDRD) formula);
  • Hypersensitivity to the study medication or any of its excipients (including known lactose hypersensitivity) or any related medication;
  • Stroke or transient ischemic attack (TIA) within 3 months;
  • Active coronary ischemia;
  • Any significant valvular disease (including any moderate or severe valvular stenosis, moderate or severe aortic or pulmonary regurgitation, stenosis or regurgitation);severe tricuspid or mitral regurgitation);
  • Primary hypertrophic or restrictive cardiomyopathy or systemic illness known to be associated with infiltrative heart disease;
  • Admission for AHF triggered primarily by a correctable etiology such as significant arrhythmia, (inclusive of atrial fibrillation as the main reason for admission), infection, severe anemia, acute coronary syndrome, pulmonary embolism, exacerbation of chronic obstructive pulmonary disease (COPD), planned admission for device implantation, or over-diuresis as a cause of hypotension;
  • Pericardial constriction or active pericarditis;
  • Life-threatening ventricular arrhythmia or implantable cardioverter defibrillator (ICD) shock within the past month or history of sudden death within 6 months;
  • Cardiac resynchronization therapy (CRT), ICD, or pacemaker implantation (or planned implantation) within the past 3 months;
  • Sustained ventricular tachycardia in the last 3 months with no defibrillator;
  • Sustained hypotension (SBP < 70 mmHg) for at least 30 minutes from the time of arrival to the hospital;
  • Severe pulmonary disease or cor pulmonale or other causes of isolated right-sided HF or not related to left ventricular dysfunction;
  • Acute respiratory distress syndrome;
  • Suspected sepsis; fever > 38°C or active infection requiring IV antimicrobial treatment;
  • Body weight < 40 kg or ≥ 150 kg;
  • Laboratory exclusions:
  • Hemoglobin < 9 g/dl,
  • Platelet count < 100,000/µl,
  • Serum potassium > 5.3 mmol/l or < 3.5 mmol/l;
  • A life expectancy < 3 months based on the judgment of the investigator;
  • Uncontrolled thyroid disease;
  • Pregnant or breast-feeding;
  • Ongoing drug or alcohol abuse;
  • Participation in another interventional study within the past 30 days.

Trial locations and contacts

13 sites in 4 countries.

13 sites in 4 countries

Argentina5 sites
  • Santorio de la Trinidad Palermo

    Buenos Aires, C1425

  • Hospital Italiano de Bueno Aires

    Capital Federal, Buenos Aires, C1199

  • Santorio Guemes

    Capital Federal, Buenos Aires, CP1180

  • Hospital Privado de Rosario

    Rosario, Sante Fe, S20000GAP

  • Instituto Cardiovascular de Rosario

    Rosario, Sante Fe, S2000DSR

Other trials in Argentina

Poland4 sites
  • Uniwersytecki Szpital Kliniczny w Białymstoku

    Bialystok, 15-276

  • Uniwersytecki Szpital Kliniczny w Opolu

    Opole, 45-401

  • Uniwersytecki Szpital Kliniczny, Centrum Chorub Serca

    Wroclaw, Lower Silesian Voivodeship, 50-556

  • 4 Wojskowy Szpital Kliniczny

    Wroclaw, 50-981

Other trials in Poland

Italy3 sites
  • Azienda Ospedaliera Santi Antonio e Biagio e Cesare Arrigo

    Alessandria

  • UOC Cardiologia, ASST degli Spedali Civili di Brescia Pizzale Spedali Civili 1

    Brescia, 25123

  • IRCCS San Raffaele Scientific Institute

    Milan, 20132

Other trials in Italy

United States1 site
  • Tufts Medical Center

    Boston, Massachusetts, 02111

Other trials in United States

About this study

Official title: A Multicenter, Randomized, Double-Blind, Placebo-Controlled, Parallel Group Study on the Safety and Efficacy of Istaroxime for Pre-Cardiogenic Shock (SEISMiC)

This is a pilot, multinational, randomized, double-blind, placebo-controlled, 2-part safety and efficacy study. Subjects will consist of patients hospitalized for acute decompensated heart failure with persistent hypotension.

Read the detailed description

This is a pilot, multinational, multicenter, randomized, double-blind, placebo-controlled, 2-part safety and efficacy study. Subjects will consist of males or females 18 to 85 years of age, hospitalized for acute decompensated heart failure (ADHF) with persistent hypotension (systolic blood pressure [SBP] 70-100 mmHg for two hours).

Part A will dose all subjects for 24 hours with either 1.0 µg/kg/min or placebo; Part B will dose all subjects for 60 hours with two different regimens of istaroxime or placebo. Enrollment of Part A and Part B will be sequential.

Up to 30 sites in Part A; up to 15 sites in Part B. Sites may be located in Europe, Asia, South America, and North America.

Being tested
Istaroxime, Placebo
Keywords
Pre-cardiogenic shock, Heart failure
Medical subject headings
Shock, Cardiogenic, Heart Failure

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • IstaroximeDrug

    Also called PST2744

    Reconstituted istaroxime and lactose lyophilized powder delivered via IV infusion

  • PlaceboDrug

    Also called Lactose lyophilized powder

    Reconstituted placebo (lactose lyophilized powder) delivered via IV infusion

Study groups in NCT04325035
Study groupRoleWhat they receive
Istaroxime - Part AExperimentalIstaroxime IV infusion for 24 hours. Istaroxime administration can begin at 1.0 or 1.5 µg/kg/min; the target infusion rate is 1.5 µg/kg/min
Receives: Drug: Istaroxime
Placebo - Part APlacebo comparatorPlacebo (lactose lyophilized powder) IV infusion for 24 hours
Receives: Drug: Placebo
Istaroxime - Part BExperimentalIstaroxime IV infusion at 1.0 µg/kg/min for 6 hours, 0.5 µg/kg/min for 42 hours, 0.25 µg/kg/min for 12 hours.
Receives: Drug: Istaroxime
Istaroxime and Placebo - Part BExperimentalIstaroxime IV infusion at 0.5 µg/kg/min for 48 hours, followed by placebo IV infusion for 12 hours.
Receives: Drug: Istaroxime; Drug: Placebo
Placebo - Part BPlacebo comparatorPlacebo (lactose lyophilized powder) IV infusion for 60 hours.
Receives: Drug: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change from baseline in systolic blood pressure (SBP) area under the curve (AUC) 0-6

    Change from baseline AUC for systolic blood pressure

    Measured: 0 to 6 hours after initiation of infusion

Secondary outcomes (29)
  1. Change from baseline in SBP AUC 0-48

    Change from baseline in AUC for systolic blood pressure in Part B

    Measured: 0 to 60 hours after initiation of infusion

  2. Change from baseline in SBP AUC 0-60

    Change from baseline in AUC for systolic blood pressure in Part B

    Measured: 0 to 48 hours after initiation of infusion

  3. Treatment failure score

    Treatment-failure score, based on death, circulatory, respiratory, or renal mechanical support or intravenous inotrope or vasopressor treatment, and changes in systolic blood pressure

    Measured: 60 hours from initiation of infusion

  4. Change from baseline in SBP

    Change from baseline in systolic blood pressure

    Measured: 6 hours after initiation of infusion

  5. Change from baseline in SBP

    Change from baseline in systolic blood pressure

    Measured: 24 hours after initiation of infusion

  6. Change from baseline in SBP

    Change from baseline in systolic blood pressure in Part B

    Measured: 48 hours after initiation of infusion

  7. Change from baseline in SBP

    Change from baseline in systolic blood pressure in Part B

    Measured: 60 hours after initiation of infusion

  8. Number of treatment failures

    Number of subjects requiring treatment with intravenous vasopressors, inotropes, and/or mechanical cardiac or renal support or have died

    Measured: Randomization to 24 hours for Part A

  9. Number of treatment failures

    Number of subjects requiring treatment with intravenous vasopressors, inotropes, and/or mechanical cardiac or renal support or have died

    Measured: Randomization to 48 hours for Part B

  10. Number of treatment failures

    Number of subjects requiring treatment with intravenous vasopressors, inotropes, and/or mechanical cardiac or renal support or have died

    Measured: Randomization to Day 5

  11. Change in quality of life

    Changes from baseline measured by the EQ-5D in Part A

    Measured: Baseline to Day 5 (96 hours) from infusion start

  12. Change in quality of life

    Changes from baseline measured by the EQ-5D in Part A

    Measured: Baseline to Day 30 from infusion start

  13. Change in eGFR

    Change from baseline and observed estimated glomerular filtration rate (eGFR)

    Measured: 24 hours from infusion start

  14. Change in eGFR

    Change from baseline and observed estimated glomerular filtration rate (eGFR)

    Measured: 48 hours from infusion start

  15. Change in brain natriuretic peptide (BNP), N-terminal pro hormone B-type natriuretic peptide (NT-pro-BNP), troponin (cTn; either T or I) and venous lactate

    Change from baseline and observed BNP, NT-pro-BNP, troponin (cTn; either T or I) and venous lactate

    Measured: 24 hours from infusion start

  16. Change in brain natriuretic peptide (BNP), N-terminal pro hormone B-type natriuretic peptide (NT-pro-BNP), troponin (cTn; either T or I) and venous lactate

    Change from baseline and observed BNP, NT-pro-BNP, troponin (cTn; either T or I) and venous lactate

    Measured: 48 hours from infusion start

  17. Time to worsening heart failure (HF)

    Time to worsening HF

    Measured: Up to Day 5

  18. Time to HF re-admission or death

    Time to HF re-admission or death

    Measured: Up to Day 30

  19. Length of initial hospitalization

    Length of initial hospitalization

    Measured: Up to Day 30

  20. Days alive and out of the hospital

    Days alive and out of the hospital

    Measured: Up to Day 30

  21. Mortality and reasons for death

    Mortality and reasons for death

    Measured: Up to Day 30

  22. Change in coronary index (CI)

    Change from baseline in CI as assessed by echocardiogram - Part A

    Measured: 24 hours

  23. Change in E to e' ratio

    Change from baseline in E to e' ratio as assessed by echocardiogram - Part A

    Measured: 24 hours

  24. Change in stroke volume index (SVI)

    Change from baseline in SVI as assessed by echocardiogram - Part A

    Measured: 24 hours

  25. Change in left atrium area (LAA)

    Change from baseline in LAA as assessed by echocardiogram - Part A

    Measured: 24 hours

  26. Change in CI

    Change from baseline in CI as assessed by echocardiogram - Part B

    Measured: 48 hours

  27. Change in E to e' ratio

    Change from baseline in E to e' ratio as assessed by echocardiogram - Part B

    Measured: 48 hours

  28. Change in SVI

    Change from baseline in SVI as assessed by echocardiogram - Part B

    Measured: 48 hours

  29. Change in LAA

    Change from baseline in LAA as assessed by echocardiogram - Part B

    Measured: 48 hours

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted27 Mar 2020
  2. Study start28 Sep 2020
  3. Primary completion26 Sep 2024
  4. Study completion30 Oct 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Triple blind
Who is masked
Participant, Care provider, Investigator
Enrolment
90 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04325035
Sponsor's protocol ID
04-CL-1904
Other IDs
2020-000885-40
Acronym
SEISMiC
Status last verified
Jan 2025
First submitted
24 Mar 2020
Last updated
4 Feb 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Metra M, Chioncel O, Cotter G, Davison B, Filippatos G, Mebazaa A, Novosadova M, Ponikowski P, Simmons P, Soffer J, Simonson S. Safety and efficacy of istaroxime in patients with acute heart failure-related pre-cardiogenic shock - a multicentre, randomized, double-blind, placebo-controlled, parallel group study (SEISMiC). Eur J Heart Fail. 2022 Oct;24(10):1967-1977. doi: 10.1002/ejhf.2629. Epub 2022 Aug 22.

    PubMed 35867804
  • Metra M, Chioncel O, Davison B, Filippatos G, Mebazaa A, Pagnesi M, Adamo M, Novosadova M, Ponikowski P, Simmons P, Soffer J, Simonson S, Cotter G. Safety and Efficacy of Istaroxime 1.0 and 1.5 microg/kg/min for Patients With Pre-Cardiogenic Shock. J Card Fail. 2023 Jul;29(7):1097-1103. doi: 10.1016/j.cardfail.2023.03.020. Epub 2023 Apr 17.

    PubMed 37075941

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Istaroxime in people with Cardiogenic Shock, run by Windtree Therapeutics at 13 sites in 4 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 13 inclusion and 32 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 4 Feb 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 13 sites in Argentina, Poland, Italy, United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change from baseline in systolic blood pressure (SBP) area under the curve (AUC) 0-6 (time frame: 0 to 6 hours after initiation of infusion). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04325035, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Feb 2025.

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