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Myocardial function in patients with Shwachman–Diamond syndrome: Aspects to consider before stem cell transplantation
Author(s) -
ToiviainenSalo Sanna,
Pitkänen Olli,
Holmström Miia,
Koikkalainen Juha,
Lötjönen Jyrki,
Lauerma Kirsi,
Taskinen Mervi,
Savilahti Erkki,
Smallhorn Jeffrey,
Mäkitie Outi,
Kivistö Sari
Publication year - 2008
Publication title -
pediatric blood and cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.116
H-Index - 105
eISSN - 1545-5017
pISSN - 1545-5009
DOI - 10.1002/pbc.21686
Subject(s) - medicine , ejection fraction , cardiology , transplantation , contractility , diastole , cardiac function curve , heart failure , isovolumic relaxation time , doppler echocardiography , blood pressure
Background Early studies have suggested increased risk of fatal cardiac complications in infants with Shwachman–Diamond syndrome (SDS), an inherited bone marrow failure syndrome. Patients undergoing stem cell transplantation (STC) have appeared susceptible to organ toxicity, including cardiac involvement. Procedure This study assessed anatomical and functional features of the heart in SDS. Eight patients (mean age 24.1 years, range 7–37 years, seven males) with SDS and confirmed SBDS mutations were prospectively assessed for cardiac anatomy, myocardial wall properties, and systolic and diastolic function. The study protocol included conventional echocardiography (n = 8) complemented by exercise Tissue‐Doppler echocardiography (n = 7), and by MRI (n = 6). Results No abnormalities in cardiac anatomy or function were observed in baseline clinical assessment, EKG, or conventional echocardiographic and MRI measurements. Myocardial structure and left ventricular (LV) mass were normal. The maximum isovolumic acceleration (IVA) value during exercise in Tissue‐Doppler was significantly lower ( P < 0.001), and the right ventricular (RV) ejection fraction ( P = 0.02) and peak filling rate (PFR, P = 0.008) at rest in MRI were higher in patients. Conclusions Children and young adults with SDS and mutations in SBDS had normal cardiac anatomy and myocardial structure. Subtle RV diastolic function alterations at rest and depressed LV contractility during exercise were observed. Further studies are warranted to evaluate the clinical importance of these findings. Pediatr Blood Cancer 2008;51:461–467. © 2008 Wiley‐Liss, Inc.