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Comparison of Angiotensin II to Standard Dose Vasopressors on Change in Arterial Elastance (Ang2)

28 avril 2026 mis à jour par: Siddharth Dugar, The Cleveland Clinic

Comparison of Angiotensin II to Standard Dose Vasopressors on Change in Arterial Elastance in Cirrhotic Patients With Vasodilatory Shock: A Prospective, Randomized Controlled Trial

A study to see whether a medication called Angiotensin II works better than the routinely used medication to raise blood pressure in people with liver disease who are experiencing a serious drop in blood pressure.

The investigators want to find out if Angiotensin II can help the heart and blood vessels work together more effectively than standard treatments.

Aperçu de l'étude

Statut

Actif, ne recrute pas

Les conditions

Intervention / Traitement

Description détaillée

Sepsis and septic shock remain associated with significant mortality, especially in cirrhotic where the mortality with septic shock exceeds 70%. Cirrhotic cardiomyopathy is a well-recognized consequence of advanced liver dysfunction and is associated with a hyperdynamic circulatory state due to vasoplegia in this population. Our group has shown septic patients with cirrhosis had higher LV systolic function as assessed by Left ventricle Ejection fraction (LVEF %), stroke volume and cardiac output with a significantly higher percentage of patients with hyperdynamic state (LVEF > 70%) than those without cirrhosis.

The investigators measured arterial elastance and ventricular elastance using echocardiography and found cirrhotic patient to have significantly lower arterial elastance with higher ventricular elastance. AII (Angiotensin II) exert its effect after the hydrolysis of Ang-1 by angiotensin converting enzyme (ACE) and is the principal product of the renin-angiotensin-aldosterone system. Advance cirrhosis is associated with reduction in Ang II levels accompanied by an increased Ang-(1-7)/Ang II ratio in the splanchnic circulation may be, at least in part, responsible for changes in vascular splanchnic tone. In addition, the relative decrease in Ang II compared to Ang (1-7), the vasodilator component of RAS causes hyperdynamic circulation from lower SVR in cirrhotic. This study also showed that with progression of liver disease leads to continual splanchnic vasodilation from higher Ang (1-7)/Ang II ratio. In advance stages this resultant hyperdynamic circulation is still insufficient to compensate for the effective arterial hypovolemia. Similar finding was observed in our large study, where the VAC was significantly lower in cirrhotic with sepsis shock despite elevation in LV elastance compared to non-cirrhotic with septic shock.

Angiotensin II, a naturally occurring octapeptide hormone increases blood pressure through various mechanisms, including vasoconstriction of peripheral vessels, potentiation of antidiuretic hormone (ADH) and adrenocorticotropin hormone (ACTH) release, and direct actions on postganglionic sympathetic fibers. The external Ang II administration will be able to reverse the altered Ang (I-7)/Ang II ratio in systemic circulation reversing vasodilation. The investigators hypothesize that external administration of Ang II will cause a higher increase in SVR in cirrhotic with septic shock compared to Standard of Care (SOC) by decreasing arterial elastance restoring non-invasive arterial ventricular coupling.

Type d'étude

Interventionnel

Inscription (Réel)

30

Phase

  • Première phase 1

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Lieux d'étude

  • États-Unis
    • Ohio
      • Cleveland, Ohio, États-Unis, 44195
        • The Cleveland Clinic

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

  • Adulte
  • Adulte plus âgé

Accepte les volontaires sains

Non

La description

Inclusion Criteria:

  • Age ≥ 18 years at the time of enrollment
  • Septic shock as defined by Sepsis-3 criteria (highly suspected or confirmed infection, requiring norepinephrine to maintain a MAP ≥ 65 mmHg, and serum lactate > 2 mmol/L after adequate fluid resuscitation) within a 48 hour window prior to enrollment
  • Confirmed cirrhotic patient (Radiological/Biopsy/Physician confirmed)
  • Preserved cardiac function as assessed using point-of-care ultrasonography or a non-invasive hemodynamic monitoring device with either LVOT VTI > 18 cm or stroke volume > 50 ml Within 48 hours of onset of shock.
  • Standard of care vasopressors are at a norepinephrine equivalent of 15 mcg/min

Exclusion Criteria:

  • Declined consent.
  • Pregnancy
  • CKD-Stage IV/V
  • ESRD on long-term hemodialysis
  • On Dialysis or planned dialysis to be initiated within 24 hours of study of enrollment.
  • Clinically determined to have primarily hepatorenal syndrome.
  • On other vasoactive medication (phenylephrine, Terlipressin, epinephrine, dobutamine, dopamine)
  • Hemorrhagic, obstructive, or hypovolemic shock is not the primary cause of shock based on clinical judgement.
  • DNR
  • Patients declared Brain dead.
  • Anticipated death within 48 hours of enrollment
  • Echocardiographic windows not available
  • Acute mesenteric Ischemia
  • Active gastrointestinal bleeding
  • Active cardiac ischemic event defined as NSTEMi, STEMI
  • Acute DVT/Pulmonary embolism/Portal vein thrombosis
  • > 48 h since initiation of vasopressor agent
  • Cardiac function assessment show LVOT VTI < 18 cm or stroke volume < 50 ml/min
  • Norepinephrine equivalent dose > 50mcg/min

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation parallèle
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Comparateur actif: Angiotensin II
Angiotensin II will be continued for 24 hours and then discontinued, and SOC vasopressors resumed according to institutional practices.
Médicament: Giapreza
2.5 mg/mL
Autres noms:
  • Angiotension II
Aucune intervention: Standard of Care
Fixed-dose vasopressin and standard of care vasopressors increased as per institutional guidelines according to MAP targets.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Change in arterial elastance
Délai: 6 hours
Change in arterial elastance will be measure by echocardiography at baseline, 6 hours and 24 hours. Dynamic arterial elastance will be calculated as the ratio between pulse pressure variation and stroke volume variation obtained from arterial line waveform.
6 hours
Change in arterial elastance
Délai: 24 hours
Change in arterial elastance will be measure by echocardiography at baseline, 6 hours and 24 hours. Dynamic arterial elastance will be calculated as the ratio between pulse pressure variation and stroke volume variation obtained from arterial line waveform.
24 hours

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Change in arterial ventricular coupling
Délai: 6 hours
Change in arterial ventricular coupling will be measured by echocardiogram at baseline, 6 hours and 24 hours. The ventricular-arterial coupling will be assessed using previously validated method where Left ventricular end-systolic elastance will be calculated by a modified single-beat method employing systolic and diastolic pressure from the arterial line, echo-Doppler stroke volume (SV), echo-derived ejection fraction (EF) and an estimated normalized ventricular elastance at arterial end-diastole (E(Nd)): E(es(sb)) = [P(d) - (E(Nd(est)) x P(s) x 0.9)[/(E(Nd(est)) x SV).
6 hours
Change in arterial ventricular coupling
Délai: 24 hours
Change in arterial ventricular coupling will be measured by echocardiogram at baseline, 6 hours and 24 hours. The ventricular-arterial coupling will be assessed using previously validated method where Left ventricular end-systolic elastance will be calculated by a modified single-beat method employing systolic and diastolic pressure from the arterial line, echo-Doppler stroke volume (SV), echo-derived ejection fraction (EF) and an estimated normalized ventricular elastance at arterial end-diastole (E(Nd)): E(es(sb)) = [P(d) - (E(Nd(est)) x P(s) x 0.9)[/(E(Nd(est)) x SV).
24 hours
Change in norepinephrine equivalent dose
Délai: 6 hours
The change in norepinephrine equivalent dose at (6 hours and 24 hours) using the following formula6 Norepinephrine dose (µg/kg/min) + epinephrine dose (µg/kg/min) + 1/150 × dopamine dose (µg/kg/min) + 1/10 × phenylephrine dose (µg/kg/min) + 2.5 × vasopressin dose (U/min)
6 hours
Change in norepinephrine equivalent dose
Délai: 24 hours
The change in norepinephrine equivalent dose at (6 hours and 24 hours) using the following formula6 Norepinephrine dose (µg/kg/min) + epinephrine dose (µg/kg/min) + 1/150 × dopamine dose (µg/kg/min) + 1/10 × phenylephrine dose (µg/kg/min) + 2.5 × vasopressin dose (U/min)
24 hours
Change in renal perfusion index
Délai: 6 hours

Improvement in renal perfusion index (Renal Resistive index) at (6 hours and 24 hours).

The Doppler-based renal restrictive index (RI) will be used for measurement using spectral Doppler at the arcuate arteries or interlobar arteries. The formula for calculating the RI is: RI = (Peak Systolic Velocity - End Diastolic Velocity) / Peak Systolic Velocity. The normal range for the RI is 0.50 to 0.70, and elevated values are associated with poorer prognosis in various renal disorders and renal transplant outcomes.
6 hours
Change in renal perfusion index
Délai: 24 hours

Improvement in renal perfusion index (Renal Resistive index) at (6 hours and 24 hours).

The Doppler-based renal restrictive index (RI) will be used for measurement using spectral Doppler at the arcuate arteries or interlobar arteries. The formula for calculating the RI is: RI = (Peak Systolic Velocity - End Diastolic Velocity) / Peak Systolic Velocity. The normal range for the RI is 0.50 to 0.70, and elevated values are associated with poorer prognosis in various renal disorders and renal transplant outcomes.
24 hours
Evaluation of 28 day renal replacement therapy free survival
Délai: 28 days after hospital discharge
The number of days alive free of renal-replacement therapy at 28 days
28 days after hospital discharge
Change in Renin levels
Délai: 24 hours

A blood sample will be obtained at two time points. The first sample will be obtained when the participant is randomized but before infusion in initiated. The second sample will be obtained at 24 hours after the initiation of the drug.

Plasma Renin Activity (PRA) is measured in ng/mL/h.
24 hours
Change in Angiotension II levels
Délai: 24 hours

A blood sample will be obtained at two time points. The first sample will be obtained when the participant is randomized but before infusion in initiated. The second sample will be obtained at 24 hours after the initiation of the drug.

Angiotensin II will be expressed in ng/dL.
24 hours
Change in Microcirculation
Délai: 6 hours
Tissue oxygen saturation (StO₂) will be measured using near-infrared spectroscopy (NIRS) at the thenar eminence. Microvascular reactivity will be assessed using a vascular occlusion test (VOT). Dynamic variables derived from the VOT will include baseline StO₂, minimum StO₂ during occlusion, and reperfusion slope.
6 hours
Change in Microcirculation
Délai: 24 hours
Tissue oxygen saturation (StO₂) will be measured using near-infrared spectroscopy (NIRS) at the thenar eminence. Microvascular reactivity will be assessed using a vascular occlusion test (VOT). Dynamic variables derived from the VOT will include baseline StO₂, minimum StO₂ during occlusion, and reperfusion slope.
24 hours

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

The Cleveland Clinic

Collaborateurs

Innoviva Specialty Therapeutics

Les enquêteurs

  • Chercheur principal: Siddharth Dugar, M.D., The Cleveland Clinic

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

15 novembre 2024

Achèvement primaire (Estimé)

1 janvier 2028

Achèvement de l'étude (Estimé)

1 janvier 2028

Dates d'inscription aux études

Première soumission

19 février 2026

Première soumission répondant aux critères de contrôle qualité

28 avril 2026

Première publication (Réel)

5 mai 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

5 mai 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

28 avril 2026

Dernière vérification

1 février 2026

Plus d'information

Termes liés à cette étude

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • 24-913

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

OUI

Description du régime IPD

After the study is completed, de-identified data and study documents may be shared on ClinicalTrials.gov in accordance with institutional policies and regulatory requirements.

Délai de partage IPD

Starting in January 2029.

Critères d'accès au partage IPD

Researchers can access the information on clinicaltrials.gov.

Type d'informations de prise en charge du partage d'IPD

  • PROTOCOLE D'ÉTUDE
  • SÈVE
  • CIF
  • ANALYTIC_CODE
  • RSE

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Oui

Étudie un produit d'appareil réglementé par la FDA américaine

Non

produit fabriqué et exporté des États-Unis.

Oui

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

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