Aortic Reservoir Function has a Strong Impact on the Cardiac Blood Supply–Workload Balance in Children
It has been reported that more than half of the ejected blood from the left ventricle is stored in the aorta during systole and expelled during diastole. One important organ that receives blood flow mainly during diastole is the heart. It is also reported that the cardiac blood supply–workload balance in small children is disadvantageous to the heart. Therefore, we measured the aortic reservoir function and examined the relationship between the aortic reservoir function and the cardiac blood supply–workload balance. The percent diastolic runoff, which is the percentage of the diastolic blood flow of the total cardiac output, was measured as the index of the aortic reservoir function. The subendocardial viability ratio—the ratio of the diastolic pressure time index (the blood supply to the heart) to the tension time index (implying the myocardial oxygen demand)—was investigated as an index of the cardiac blood supply–workload balance in children. The percent diastolic runoff was 51.7 ± 4.5%, smaller than that in adult. It had a significant positive relationship to age (r2 = 0.32, p = 0.0052). The subendocardial viability ratio was 100.8 ± 19.6% and had a strong relationship to the percent diastolic runoff (r2 = 0.92, p < 0.0001). The percent diastolic runoff had a positive relationship with age during childhood. The value had a strong impact on the cardiac blood supply–workload balance.
KeywordsChild Aortic reservoir function Subendocardial viability ratio Buckberg index Coronary circulation Diastole
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There are no conflict of interest.
- 2.The coronary circulation. In: Nichols WW, O’Rourke MF, Vlachopoulos C (eds) (2011) McDonald’s blood flow in arteries, 6th edn. Hodder Arnold, London, pp 375–396Google Scholar
- 10.Ponikowski P, Voors AA, Anker SD, Bueno H, Cleland JG, Coats AJ, Falk V, González-Juanatey JR, Harjola VP, Jankowska EA, Jessup M, Linde C, Nihoyannopoulos P, Parissis JT, Pieske B, Riley JP, Rosano GM, Ruilope LM, Ruschitzka F, Rutten FH, van der Meer P, Authors/Task Force Members, Document Reviewers (2016) 2016 ESC guidelines for the diagnosis and treatment of acute and chronic heart failure: The Task Force for the diagnosis and treatment of acute and chronic heart failure of the European Society of Cardiology (ESC). Developed with the special contribution of the Heart Failure Association (HFA) of the ESC. Eur J Heart Fail 18:891–975CrossRefPubMedGoogle Scholar