Antihypertensive Treatment of Acute Cerebral Hemorrhage-II

Overview

The specific aims of this study are to: 1. Definitively determine the therapeutic benefit of the intensive treatment relative to the standard treatment in the proportion of patients with death and disability (mRS 4-6) at 3 months among subjects with ICH who are treated within 4.5 hours of symptom onset. 2. Evaluate the therapeutic benefit of the intensive treatment relative to the standard treatment in the subjects' quality of life as measured by EuroQol at 3 months. 3. Evaluate the therapeutic benefit of the intensive treatment relative to the standard treatment in the proportion of hematoma expansion (defined as increase from baseline hematoma volume of at least 33%) and in the change from baseline peri-hematoma volume at 24 hours on the serial computed tomographic (CT) scans. 4. Assess the safety of the intensive treatment relative to the standard treatment in the proportion of subjects with treatment-related serious adverse events (SAEs) within 72 hours.

Full Title of Study: “Antihypertensive Treatment of Acute Cerebral Hemorrhage (ATACH)-II: A Phase III Randomized Multicenter Clinical Trial of Blood Pressure Reduction for Hypertension in Acute Intracerebral Hemorrhage”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: Double (Investigator, Outcomes Assessor)
  • Study Primary Completion Date: December 21, 2015

Detailed Description

The report from a National Institute of Neurological Disorders and Stroke Workshop on priorities for clinical research in intracerebral hemorrhage (ICH) in December 2003 recommended clinical trials for evaluation of blood pressure (BP) management in acute ICH as a leading priority. The Special Writing Group of the Stroke Council of the American Heart Association in 1999 and 2007 emphasized the need for clinical trials to ensure evidence-based treatment of acute hypertension in ICH. Consequently, we propose to conduct a five-year international, multicenter, open-labeled, randomized, controlled, Phase III trial to determine the efficacy of early, intensive antihypertensive treatment using intravenous nicardipine for acute hypertension in subjects with co-morbid hypertension and spontaneous supratentorial ICH. The primary hypothesis of this large, streamlined, focused trial is that the group treated with intensive BP reduction (systolic BP [SBP] of 140 mmHg or less - hereafter referred to as the intensive treatment) using intravenous nicardipine infusion for 24 hours reduces the proportion of death and disability at 3 months by 10% or greater compared with the group treated with the standard BP reduction (SBP of 180 mmHg or less - hereafter referred to as the standard treatment) among patients with ICH treated within 4.5 hours of symptom onset. The underlying mechanism for this expected beneficial effect of intensive treatment is mediated through reduction of the rate and magnitude of hematoma expansion observed in approximately 38% of patients with acute ICH. The trial will recruit a maximum of 1,280 subjects with ICH who meet the eligibility criteria. The primary outcome is the proportion of death and disability at 3 months defined by modified Rankin scale (mRS) score of 4 to 6. The proposed clinical trial is the natural extension of numerous case series, a subsequent pilot trial funded by the National Institutes of Health National Institute of Health (NIH), and a preliminary randomized controlled trial in this patient group funded by the Australian National Health and Medical Research Council, that have recently confirmed the safety and tolerability of both the regimen and goals of the antihypertensive treatment in acutely hypertensive patients with ICH proposed in the present trial. The proposed trial will have important public health implications by providing necessary information regarding the efficacy and safety of antihypertensive treatment of acute hypertension observed in up to 75% of the subjects with ICH. BP treatment represents a strategy that can be made widely available without the need of specialized equipment and personnel and therefore can make a major impact upon outcome in patients with ICH. Substantial reduction in morbidity and mortality appears possible if the estimates of treatment effect sizes from current pilot trials are accurate.

Interventions

  • Drug: Intravenous nicardipine hydrochloride
    • IV nicardipine is initiated at a rate of 5 mg/hr, is continued, and is increased by 2.5 mg/hr increments every 15 min until the target SBP or maximum dose of 15 mg/hr is reached. If SBP is above the target SBP despite infusion of the maximum nicardipine dose for 30 minutes, a second agent may be used (Labetalol 5-20 mg IV bolus every 15 min; diltiazem/urapidil in countries without labetalol) for another hour. Nicardipine infusion is decreased incrementally or is stopped if SBP falls below the desired treatment range. Fluid bolus for SBP still falling below 110 mmHG (millimeters of mercury) with nicardipine off is given to prevent organ hypoperfusion. Vasopressor agents are not used unless symptoms related to or possibly exacerbated by hypoperfusion are present.

Arms, Groups and Cohorts

  • Active Comparator: Standard SBP Reduction Arm
    • Intravenous nicardipine hydrochloride will be used as necessary (pro re nata or “PRN”) as the primary agent in lowering SBP. The goal for the standard BP reduction group will be to reduce and maintain SBP < 180 mmHg for 24 hours from randomization. 160 mmHg is the target SBP for this arm. For the standard group, SBP below the assigned treatment range is not artificially elevated to stay within the range if lower SBP occurs with nicardipine turned off (no fluid bolus given unless SBP falls below 110 mmHg with nicardipine off and there is risk for hypotension). Euvolemic fluid maintenance is encouraged for all patients according to their medical needs, which may differ.
  • Active Comparator: Intensive SBP Reduction Arm
    • Intravenous nicardipine hydrochloride will be used as necessary (pro re nata or “PRN”) as the primary agent in lowering SBP. The goal for the intensive BP reduction group will be to reduce and maintain SBP < 140 mmHg for 24 hours from randomization. 125 mmHg is the target SBP for this arm. For the intensive group, SBP falling below 110 mmHg (lower limit of the assigned treatment range) with nicardipine off is treated with normal saline fluid bolus to prevent or remedy hypotension. Euvolemic fluid maintenance is encouraged for all patients according to their medical needs, which may differ.

Clinical Trial Outcome Measures

Primary Measures

  • Death or Disability According to Modified Rankin Scale Score at 90 Days (3 Months) From Randomization
    • Time Frame: 90 days (± 14 days per protocol window; up to ± 30 days data is used) from randomization
    • The primary outcome was death or disability, defined by modified Rankin scale (mRS) of 4-6 at 90 days following treatment. The modified Rankin Scale score ranges from 0, indicating no symptoms, to 6, indicating death. A score of 4 indicates moderately severe disability including the inability to walk or attend to one’s own bodily needs. A score of 5 indicates severe disability; bedridden, incontinent, and requiring constant nursing care. To score a 3 or lower on the mRS, a person must at least be able to walk without the assistance of another person. We chose the mRS because of its high inter-observer reliability, superiority to other indices, and consistency with previous trials in patients with ICH. Reliability was further increased by use of a structured interview template and by requiring mRS assessors to pass a certification test. Persons conducting the 90-day mRS assessment were to be unaware of the treatment arm or clinical course of the patients they assessed.

Secondary Measures

  • Quality of Life at 90 Days Using EuroQol (EQ) Measures: EQ-5D (EuroQol Five Dimension), Consisting of Standardized EQ-5D-3L (EuroQol Five Dimension, Three-Level) Questionnaire and EQ VAS (EuroQol Visual Analog Scale) Scores
    • Time Frame: 90 days (± 14 days per protocol window; up to ± 30 days data is used) from randomization
    • Standardized scales developed by the EuroQol Research Foundation were used as a secondary outcome measure in addition to the mRS scale score. The EQ-5D is a simple, standardized non-disease-specific instrument for describing and valuating health-related quality of life. The EQ-5D-3L questionnaire consists of 5 questions in 5 different domains and allows for responses from 1 (the best outcome) to 3 (the worst outcome) in each of five categories (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression). Total scores range from 5 to 15, with lower scores indicating better quality of life and a higher score indicating a worse quality of life. A second component of EuroQol outcome measurements is a printed 20 cm visual analogue scale (EQ VAS) that appears somewhat like a thermometer, on which a score from 0 (worst imaginable health state or death) to 100 (best imaginable health state) is marked by the patient (or, when necessary, their proxy) with the scale in view.
  • Hematoma Expansion (Number of Patients With Hematoma Expansion of 33% or Greater Between the Baseline and 24 +/- 6 Hours Head CTs, as Measured by the Central Reader for Patients With Readable Scans for Both Time Points Submitted by Data Lock.)
    • Time Frame: From the baseline head CT to the 24 +/- 6 hours from randomization head CT
    • Hematoma expansion as determined by serial CT scans: Hematoma expansion was defined as an increase in the volume of intraparenchymal hemorrhage of 33% or greater as measured by a central imaging analyst who was was unaware of the treatment assignments, clinical findings, and time points of image acquisition. The area of the hematoma was delineated by image analysis software with the use of density thresholds on each slice, followed by manual correction. To ensure accuracy and consistency of the readings, images were coded randomly and independently of subject numbers and manual correction was also done without awareness of treatment assignments, clinical findings, or time points of image acquisition. This data point is defined as being present (hematoma expansion of 33% or more was calculated between the baseline scan hematoma volume and the 24 +/- 6 hours hematoma volume measures at data analysis), meaning that hematoma expansion as defined must have occurred or it was not counted.

Participating in This Clinical Trial

Inclusion Criteria

  • Age 18 years or older – IV nicardipine can be initiated within 4.5 hours of symptom onset. – Clinical signs consistent with the diagnosis of stroke, including impairment of language, motor function, cognition, and/or gaze, vision, or neglect. – Total Glasgow Coma Scale (GCS) score (aggregate of verbal, eye, and motor response scores) of 5 or greater at time of emergency department (ED) arrival. – International normalized ratio (INR) value < 1.5 – CT scan demonstrates intraparenchymal hematoma with manual hematoma volume measurement <60 cc. – For subjects randomized prior to IV antihypertensive administration: SBP greater than 180 mmHg* prior to IV antihypertensive treatment (this includes pre-hospital treatment) AND WITHOUT spontaneous SBP reduction to below 180 mmHg at the time of randomization OR – For subjects randomized after IV antihypertensive administration: SBP greater than 180 mmHg* prior to IV antihypertensive treatment (this includes pre-hospital treatment) AND WITHOUT SBP reduction to below 140 mmHg at the time of randomization. – Informed consent obtained by subject, legally authorized representative, or next of kin. – Notes: The unit "mmHg" stands for "millimeters of mercury", a standard way of measuring blood pressure. Patients with SBP < 180 mmHg should be monitored for 4.5 hours from symptom onset as their SBP may rise to eligible levels before the eligibility window closes. Exclusion Criteria:

  • ICH is due to previously known neoplasms, arteriovenous malformation (AVM), or aneurysms. – Intracerebral hematoma considered to be related to trauma. – ICH located in infratentorial regions such as pons or cerebellum. – Intraventricular hemorrhage (IVH) associated with intraparenchymal hemorrhage and blood completely fills one lateral ventricle or more than half of both ventricles. – Patient to receive immediate surgical evacuation. – Current pregnancy, or parturition within previous 30 days, or active lactation. – Use of dabigatran within the last 48 hours**. – A platelet count less than 50,000 per microliter (µL or mm3) – Known sensitivity to nicardipine. – Pre-morbid disability requiring assistance in ambulation or activities of daily living. – Subject's living will precludes aggressive ICU management. – Subject is currently participating in another interventional clinical trial – Use of dabigatran was clarified through investigator presentations, educational materials, and clinical tools to include newer similar class medications (such as rivaroxaban, apixaban, and edoxaban) that were being developed and in various stages of approval across enrolling countries through the course of this trial, in the event that patients using these medications may have been encountered during screening.

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • University of Minnesota
  • Collaborator
    • National Institute of Neurological Disorders and Stroke (NINDS)
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Official(s)
    • Adnan I Qureshi, MD, Study Chair, University of Minnesota
    • Yuko Y Palesch, PhD, Study Director, Medical University of South Carolina
    • Adnan I Qureshi, MD, Principal Investigator, University of Minnesota
    • Yuko Y Palesch, PhD, Principal Investigator, Medical University of South Carolina

References

Qureshi AI, Palesch YY, Martin R, Novitzke J, Cruz-Flores S, Ehtisham A, Ezzeddine MA, Goldstein JN, Hussein HM, Suri MF, Tariq N; Antihypertensive Treatment of Acute Cerebral Hemorrhage Study Investigators. Effect of systolic blood pressure reduction on hematoma expansion, perihematomal edema, and 3-month outcome among patients with intracerebral hemorrhage: results from the antihypertensive treatment of acute cerebral hemorrhage study. Arch Neurol. 2010 May;67(5):570-6. doi: 10.1001/archneurol.2010.61.

Antihypertensive Treatment of Acute Cerebral Hemorrhage (ATACH) investigators. Antihypertensive treatment of acute cerebral hemorrhage. Crit Care Med. 2010 Feb;38(2):637-48. doi: 10.1097/CCM.0b013e3181b9e1a5.

Qureshi AI. Acute hypertensive response in patients with stroke: pathophysiology and management. Circulation. 2008 Jul 8;118(2):176-87. doi: 10.1161/CIRCULATIONAHA.107.723874. No abstract available.

Qureshi AI. Antihypertensive Treatment of Acute Cerebral Hemorrhage (ATACH): rationale and design. Neurocrit Care. 2007;6(1):56-66. doi: 10.1385/ncc:6:1:56.

Qureshi AI, Palesch YY. Antihypertensive Treatment of Acute Cerebral Hemorrhage (ATACH) II: design, methods, and rationale. Neurocrit Care. 2011 Dec;15(3):559-76. doi: 10.1007/s12028-011-9538-3.

Qureshi AI, Palesch YY, Martin R, Novitzke J, Cruz Flores S, Ehtisham A, Goldstein JN, Kirmani JF, Hussein HM, Suri MF, Tariq N; Antihypertensive Treatment of Acute Cerebral Hemorrhage Investigators. Systolic blood pressure reduction and risk of acute renal injury in patients with intracerebral hemorrhage. Am J Med. 2012 Jul;125(7):718.e1-6. doi: 10.1016/j.amjmed.2011.09.031. Epub 2012 May 4.

Qureshi AI, Palesch YY, Martin R, Toyoda K, Yamamoto H, Wang Y, Wang Y, Hsu CY, Yoon BW, Steiner T, Butcher K, Hanley DF, Suarez JI. Interpretation and Implementation of Intensive Blood Pressure Reduction in Acute Cerebral Hemorrhage Trial (INTERACT II). J Vasc Interv Neurol. 2014 Jun;7(2):34-40. No abstract available.

Citations Reporting on Results

Qureshi AI, Palesch YY, Barsan WG, Hanley DF, Hsu CY, Martin RL, Moy CS, Silbergleit R, Steiner T, Suarez JI, Toyoda K, Wang Y, Yamamoto H, Yoon BW; ATACH-2 Trial Investigators and the Neurological Emergency Treatment Trials Network. Intensive Blood-Pressure Lowering in Patients with Acute Cerebral Hemorrhage. N Engl J Med. 2016 Sep 15;375(11):1033-43. doi: 10.1056/NEJMoa1603460. Epub 2016 Jun 8.

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