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Published on: May 17, 2024
[Correlation of H-type hypertension and prognosis of ischemic stroke]
Hai-li Wang1, Song Tan, Bo Song
1Department of Neurology, First Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, China.
Insights
H-type hypertension combined with hyperhomocysteinemia (high homocysteine levels) significantly worsens the prognosis for ischemic stroke patients. This combination acts as a critical risk factor, highlighting the need for integrated management strategies.
Area of Science:
- Neurology
- Cardiovascular Medicine
- Clinical Research
Context:
- Ischemic stroke is a leading cause of disability and mortality worldwide.
- Hypertension and hyperhomocysteinemia are recognized risk factors for cardiovascular diseases.
- The combined impact of H-type hypertension and hyperhomocysteinemia on ischemic stroke prognosis requires further elucidation.
Purpose:
- To investigate the correlation between H-type hypertension, hyperhomocysteinemia, and the prognosis of acute ischemic stroke.
- To determine if the coexistence of these conditions influences stroke outcomes.
- To identify risk factors affecting the 6-month recovery of ischemic stroke patients.
Summary:
- A cohort of 634 acute ischemic stroke patients was analyzed.
- Logistic regression revealed a significant correlation between H-type hypertension and poor 6-month prognosis (MRS ≥ 3) when homocysteine levels were ≥ 15 µmol/L.
- An interaction effect was observed between hypertension and hyperhomocysteinemia, with RERI=0.683, AP=26.61%, and S=1.59.
Impact:
- H-type hypertension is identified as a significant risk factor for poor ischemic stroke prognosis.
- The study demonstrates a synergistic interaction between hypertension and hyperhomocysteinemia in influencing stroke outcomes.
- Findings underscore the importance of managing both hypertension and homocysteine levels for improved patient recovery.
Objective:
To examine the correlation between hypertension with hyperhomocysteinemia and prognosis of ischemic stroke.
Methods:
A total of 634 patients with acute ischemic stroke confirmed by computed tomography or magnetic resonance imaging were recruited at Department of Neurology, First Affiliated Hospital, Zhengzhou University from January 1, 2007 to May 30, 2010. Their NIHSS (National Institute of Health Stroke Scale) scores were evaluated on admission. And their baseline profiles and probable prognostic factors were recorded. Recovery was assessed by modified Rankin score (MRS) during a 6-month follow-up. Multivariate Logistic regression was performed for statistical analysis.
Results:
Among them, 32 became lost to follow-up. There were 197 females (32.7%) and 405 males (67.3%) with an average age of (59 ± 13) years (range: 19 - 92). The average level of homocysteine was (19 ± 11) µmol/L. There were 343 (57%) patients with hypertension and MRS ≥ 3 was in 145 (31%) patients. Logistic regression analysis showed that significant correlations existed between H-type hypertension and 6-month MRS (P = 0.012, OR = 2.566, 95%CI: 1.299 - 5.357) when homocysteine ≥ 15 µmol/L was defined for hyperhomocysteinemia. And there was a total sum of interaction between hypertension and hyperhomocysteinemia. The parameters of relative excess risk of interaction (RERI), attributable proportion due to interaction (AP) and synergy index (S) were 0.683, 26.61% and 1.59 respectively. Other parameters with significant prognostic correlations included age, history of stroke, NIHSS score on admission and diastolic blood pressure on admission.
Conclusion:
At the homocysteine level of ≥ 15 µmol/L, H-type hypertension and 6-month MRS have significant correlations. And H-type hypertension is a risk factor for the prognosis of ischemic stroke. When hypertension and hyperhomocysteinemia coexist, there is a total sum of interaction.
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