Controlling Hypertension After Severe Cerebrovascular Event (CHASE)

Air Force Military Medical University of People's Liberation Army

Status: Completed

Conditions: Hypertension; Severe Stroke; Acute Stroke

Treatments: Procedure: Individualized BP lowering

Study type: Interventional

Funder types: Other

Identifiers

NCT02982655

KY20162085-2

Details and patient eligibility

About

The purpose of this academic lead study is to explore ideal blood pressure targets and optimum individualized anti-hypertension strategies in acute severe stroke.

Full description

Of high mortality and morbidity, severe stroke is associated with devastating damages in neurologic, respiratory, circulatory and many other systems. The outcomes of patients with severe stroke depend largely on medical strategies on acute stage, especially on blood pressure (BP) management. Unfortunately, so far no ideal BP range has been scientifically determined for patients with acute severe stroke.

The CHASE study aims to provide reliable data on the effects of individualized anti-hypertension strategy in patients with acute severe stroke (target recruitment 250) compared to standard guideline-based management of BP (target recruitment 250). Patients presenting with acute (<72h) severe stroke (GCS ≦ 12 or NIHSS ≧ 11) and elevated BP (systolic blood pressure ≧150 mmHg or diastolic blood pressure ≧ 100 mmHg) will be randomly assigned to individualized anti-hypertension treatment or guideline-based treatment for 7 days.

Enrollment: 500 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. age ≥ 18 years;
2. the randomly assigned BP-lowering regimen is able to be commenced within 72 h after the onset of stroke (ischemic or hemorrhagic), confirmed by a computed tomography (CT) or magnetic resonance imaging (MRI) scan of the brain (if the precise timing of the onset of symptoms or signs of the qualifying event is unknown, then the time of onset will be taken as the last time the patient was known to be well);
3. GCS on admission ≤ 12 or NIHSS on admission ≥ 11;
4. there are at least two SBP measurements of ≥ 150 and ≤ 210 mmHg, recorded ≥5 min apart (patients with an initial SBP < 150 mmHg may be randomized when the SBP fulfils entry criteria on rechecking up to 72 h after the onset of stroke);
5. written informed consent is able to be obtained directly from the patient or an appropriate surrogate, based on local ethics committee recommendations.

Exclusion criteria

1. patients who have received thrombolytic therapy, embolectomy, or decompressive craniectomy for the current stroke;
2. patients with subarachnoid hemorrhage;
3. known definite contraindication to acute BP lowering (e.g. known severe carotid, vertebral, or cerebral arterial stenosis, Moyamoya disease or Takayasu's arteritis, high grade stenotic valvular heart disease);
4. secondary to a structural abnormality in the brain (e.g. an arteriovenous malformation, intracranial aneurysm, tumor, or trauma);
5. unstable vital signs and requiring the use of vasoactive agents;
6. known existing dementia or prestroke disability (e.g. score 3-5 on the modified Rankin scale);
7. concomitant medical illness that would interfere with the outcome assessments and/or follow-up (advanced cancer; severe pulmonary dysfunction [forced expiratory volume in 1 s < 50%]; severe cardiac dysfunction [ejection fraction ≤ 50%]; severe hepatic failure [Child-Pugh score ≥ 7]; severe renal failure [glomerular filtration rate ≤ 30 mL/min or serum creatinine ≥ 4 mg/dL]);
8. patients who are currently participating in other investigational trials;
9. patients who are considered to have a high likelihood of not adhering to the study treatment or the follow-up regimen.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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500 participants in 2 patient groups

Individualized BP lowering

Experimental group

Description:

Management policy is to lower the systolic or diastolic BP by 10-15% within 2 hours of randomization and sustained for 7 days. Sites were provided with protocols for different intravenous agents and used whichever routinely available drugs were in their hospital.

Treatment:

Procedure: Individualized BP lowering

Guideline recommended BP lowering

Active Comparator group

Description:

Patients received management of BP based on the standard guidelines at the time, as published by the Chinese Society of Neurology (CSN) in 2014. The attending clinician may consider commencing BP treatment and sustained for 7 days if the systolic BP \> 200 mmHg or diastolic BP \>110 mmHg in patients with ischemic stroke, and systolic BP \> 180 mmHg or diastolic BP \> 110 mmHg in patients with cerebral hemorrhage.

Treatment:

Procedure: Individualized BP lowering