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Measuring the Carotid to Femoral Pulse Wave Velocity Cf-PWV to Evaluate Arterial Stiffness
Published on: May 3, 2018
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Arterial Stiffness Is Associated With QTc Interval Prolongation in Patients With Heart Failure.
Salah Al-Zaiti1, Samir Saba2, Rodolfo Pike3
11 University of Pittsburgh, Pittsburgh, PA, USA.
Biological Research for Nursing
|October 28, 2017
Summary
Arterial stiffness, a marker of endothelial dysfunction, is linked to prolonged corrected QT (QTc) intervals in heart failure patients without conduction issues. This finding may inform strategies to reduce cardiac event risk.
Area of Science:
- Cardiology
- Clinical Physiology
Background:
- Prolonged corrected QT (QTc) interval is a significant risk factor for adverse cardiac events.
- Understanding QTc determinants is crucial for managing high-risk heart failure patients.
- Arterial stiffness is investigated as a potential determinant of QTc prolongation in heart failure.
Purpose of the Study:
- To evaluate the role of arterial stiffness as a determinant of QTc interval prolongation in ambulatory heart failure patients.
- To identify physiologic correlates of QTc prolongation in this population.
Main Methods:
- Observational study of ambulatory heart failure patients (NYHA Classes I-II).
- Noninvasive 12-lead electrocardiography (ECG) and hemodynamic monitoring (BioZ Dx impedance cardiography) were performed.
- Pearson's r coefficients and multivariate linear regression were used to assess correlations.
Main Results:
- In patients with narrow QRS complexes, QTc interval moderately correlated with cardiac output, left cardiac work index, systemic vascular resistance, and total arterial compliance.
- Increasing systemic vascular resistance and decreasing total arterial compliance independently predicted QTc prolongation (R² = .54).
- No significant correlations were found in patients with pacing or bundle branch block (BBB).
Conclusions:
- Arterial stiffness, an indirect measure of endothelial dysfunction, is associated with QTc interval prolongation in heart failure patients without conduction abnormalities.
- These findings highlight the link between vascular health and cardiac electrical stability.
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