Vascular Physiology according to Clinical Scenario in Patients with Acute Heart Failure: Evaluation using the Cardio-Ankle Vascular Index

Area of Science:

• Cardiology
• Vascular Biology
• Medical Diagnostics

Background:

• Increased aortic stiffness is a potential cause of acute heart failure (AHF).
• Clinical Scenario (CS) classification stratifies AHF patients by initial systolic blood pressure (sBP) to guide therapy.
• CS1 patients (sBP > 140 mmHg) are presumed to have elevated aortic stiffness, but this requires further validation.

Purpose of the Study:

• To assess aortic stiffness in AHF patients across different Clinical Scenarios (CS).
• To determine if elevated aortic stiffness, a form of vascular failure, is present in CS1 AHF patients.
• To utilize the cardio-ankle vascular index (CAVI), a blood pressure-independent measure, for assessing aortic stiffness.

Main Methods:

• Sixty-four AHF patients were classified into CS1 (sBP > 140 mmHg), CS2 (100-140 mmHg), and CS3 (sBP < 100 mmHg).
• Cardio-ankle vascular index (CAVI) was measured to assess aortic stiffness.
• Statistical analysis (ANOVA) was used to compare CAVI across CS groups.

Main Results:

• Significant differences in CAVI were observed across the CS groups (p = 0.006).
• CAVI was significantly higher in CS1 patients compared to CS2 (p = 0.02) and CS3 (p = 0.04).
• CAVI showed no significant correlation with instantaneous sBP (r = 0.24, p = 0.06).

Conclusions:

• Aortic stiffness, measured by the blood pressure-independent CAVI, is significantly increased in CS1 AHF patients.
• Vascular failure is a characteristic feature at the initiation of CS1 AHF.
• These findings support the role of vascular failure in CS1 AHF and may inform therapeutic approaches.