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A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
Published on: February 7, 2015
The EffecTs of Amlodipine and other Blood PREssure Lowering Agents on Microvascular FuncTion in Small Vessel Diseases
Anna Kopczak1, Michael S Stringer2, Hilde van den Brink3
1Institute for Stroke and Dementia Research, University Hospital, LMU Munich, Munich, Germany.
Insights
This study investigated if different blood pressure medications affect brain microvascular function in cerebral small vessel diseases (SVDs). Results will clarify optimal antihypertensive strategies for SVD patients.
Area of Science:
- Neurology
- Cardiology
- Pharmacology
Background:
- Hypertension is a key modifiable risk factor for cerebral small vessel diseases (SVDs).
- The differential impact of various antihypertensive drug classes on microvascular function in SVD patients remains unclear.
Purpose of the Study:
- To compare the effects of amlodipine, losartan, and atenolol on microvascular function in patients with symptomatic SVDs.
- To assess if amlodipine or losartan offer superior microvascular benefits compared to atenolol.
Main Methods:
- The study employed a prospective, open-label, randomized crossover trial (TREAT-SVDs) with blinded endpoint assessment.
- Patients with symptomatic SVDs (sporadic or CADASIL) received amlodipine, losartan, and atenolol monotherapy in random order.
- Cerebrovascular reactivity (CVR) via MRI was the primary outcome, with blood pressure (BP) and BP variability (BPv) as secondary outcomes.
Main Results:
- This section is not available in the provided abstract.
Conclusions:
- The TREAT-SVDs trial aims to elucidate how distinct antihypertensive medications influence CVR, BP, and BPv in individuals with symptomatic sporadic and hereditary SVDs.
- Findings are expected to inform clinical decisions regarding the management of hypertension in SVD patients.
Background:
Hypertension is the leading modifiable risk factor for cerebral small vessel diseases (SVDs). Yet, it is unknown whether antihypertensive drug classes differentially affect microvascular function in SVDs.
Aims:
To test whether amlodipine has a beneficial effect on microvascular function when compared to either losartan or atenolol, and whether losartan has a beneficial effect when compared to atenolol in patients with symptomatic SVDs.
Design:
TREAT-SVDs is an investigator-led, prospective, open-label, randomised crossover trial with blinded endpoint assessment (PROBE design) conducted at five study sites across Europe. Patients aged 18 years or older with symptomatic SVD who have an indication for antihypertensive treatment and are suffering from either sporadic SVD and a history of lacunar stroke or vascular cognitive impairment (group A) or CADASIL (group B) are randomly allocated 1:1:1 to one of three sequences of antihypertensive treatment. Patients stop their regular antihypertensive medication for a 2-week run-in period followed by 4-week periods of monotherapy with amlodipine, losartan and atenolol in random order as open-label medication in standard dose.
Outcomes:
The primary outcome measure is cerebrovascular reactivity (CVR) as determined by blood oxygen level dependent brain MRI signal response to hypercapnic challenge with change in CVR in normal appearing white matter as primary endpoint. Secondary outcome measures are mean systolic blood pressure (BP) and BP variability (BPv).
Discussion:
TREAT-SVDs will provide insights into the effects of different antihypertensive drugs on CVR, BP, and BPv in patients with symptomatic sporadic and hereditary SVDs.
Funding:
European Union's Horizon 2020 programme.
Trial Registration:
NCT03082014.
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