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Relationships of high cardiac output with ventricular morphology, myocardial energetics, and energy costs in hemodialysis patients with preserved ejection fraction

Citation

Harada, T and Obokata, M and Kurosawa, K and Sorimachi, H and Yoshida, K and Ishida, H and Ito, K and Ogawa, T and Ando, Y and Kurabayashi, MA and Negishi, K, Relationships of high cardiac output with ventricular morphology, myocardial energetics, and energy costs in hemodialysis patients with preserved ejection fraction, International Journal of Cardiovascular Imaging pp. 1-11. ISSN 1569-5794 (2018) [Refereed Article]


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DOI: doi:10.1007/s10554-018-1472-4

Abstract

Hemodialysis patients have conditions that increase cardiac output (CO), including arteriovenous fistula, fluid retention, vasodilator use, and anemia. We sought to determine the relationships between these factors and CO and to evaluate the effects of the high-output states on ventricular morphology, function, and myocardial energetics in hemodialysis patients, using noninvasive load-insensitive indices. Cardiovascular function was assessed in hemodialysis patients with high output [ejection fraction ≥ 50%, cardiac index (CI) > 3.5 L/min/m2, n = 30], those with normal output (CI < 3.0 L/min/m2, n = 161), and control subjects without hemodialysis (n = 155). As compared to control subjects and hemodialysis patients with normal CI, patients with elevated CI were anemic and displayed decreased systemic vascular resistance index (SVRI), excessive left ventricular (LV) contractility, larger LV volume, and tachycardia. Lower hemoglobin levels were correlated with decreased SVRI, excessive LV contractility, and higher heart rate, while estimated plasma volume and interdialytic weight gain were associated with larger LV volume, thus increasing CO. High output patients displayed markedly increased pressure-volume area (PVA) and PVA/stroke volume ratio, which were correlated directly with CO. The use of combination vasodilator therapy (angiotensin-converting enzyme inhibitor/angiotensin-receptor blocker and calcium channel blocker) was not associated with high-output states. In conclusion, anemia and fluid retention are correlated with increased CO in hemodialysis patients. The high-output state is also associated with excessive myocardial work and energy cost.

Item Details

Item Type:Refereed Article
Keywords:anemia, cardiac output, fluid retention, hemodialysis, myocardial energetics
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Negishi, K (Dr Kazuaki Negishi)
ID Code:129064
Year Published:2018
Deposited By:Menzies Institute for Medical Research
Deposited On:2018-11-07
Last Modified:2018-11-08
Downloads:0

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