Does the age of onset of growth hormone deficiency affect cardiac performance? A radionuclide angiography study(568 views) Colao A, Cuocolo A, Di Somma C, Cerbone G, Della Morte A, Pivonello R, Nicolai E, Salvatore M, Lombardi G
Keywords: Growth Hormone, Somatomedin C, Adult, Article, Blood Pressure Measurement, Controlled Study, Disease Duration, Electrocardiogram, Exercise, Female, Groups By Age, Growth Hormone Deficiency, Heart Development, Heart Left Ventricle Ejection Fraction, Heart Performance, Heart Rate, Hormone Blood Level, Human, Major Clinical Study, Onset Age, Priority Journal, Scintiangiography, Age Of Onset, Analysis Of Variance, Case-Control Studies, Cross-Sectional Studies, Electrocardiography, Gated Blood-Pool Imaging, Heart Diseases, Insulin-Like Growth Factor I, Middle Aged,
Affiliations: Dept. of Molec./Clin. Endocrinol./O., Dept. of Biomorphological/Funct. S., Pozzilli, Italy
Nucl. Med. Ctr. of the Natl. C., Dept. of Biomorphological/Funct. S., 'Federico II' University of Naples, Pozzilli, Italy
INM Neuromed, Pozzilli, Italy
Dept. of Molec. /Clin. Endocrinol. /O., Dept. of Biomorphological/Funct. S., Pozzilli, Italy
References: Not available.
Does the age of onset of growth hormone deficiency affect cardiac performance? A radionuclide angiography study
BACKGROUND: GH and IGF-I seem to play a relevant role in cardiac development and performance. Longstanding GH deficiency (GHD) causes several abnormalities in cardiac structure and performance which ultimately determine an increased cardiovascular morbidity and mortality. OBJECTIVE: To investigate whether the age of onset of GHD plays a role in determining the negative effects on the heart. DESIGN: Open cross-sectional PATIENTS: 55 patients with adulthood-onset GHD and 36 healthy sex- and age-matched controls. Patients and controls were divided into 2 groups in line with age: 32 patients and 16 controls, were aged ≤ 35 years (young); while 23 patients and 20 controls were aged between 36 and 60 years (middle-aged). The estimated disease duration was similar in young (6.7 ± 0.5 years) and middle-aged patients (8.1 ± 1.2 years, P = 0.2). STUDY PROTOCOL: All subjects underwent ECG, blood pressure and heart rate measurement, plasma IGF-I level assay, and equilibrium radionuclide angiography. RESULTS: Plasma IGF-I levels were significantly lower in patients than in controls (P < 0.0001). When considered as a whole, no difference in systolic (SBP) and diastolic blood pressure (DBP) at peak exercise was found between patients and controls. However, a significant decrease of SBP at rest was found in young patients as compared to age-matched controls (P = 0.009), while a significant increase of DBP at rest was found in middle-aged patients as compared to age-matched controls (P = 0.03). In addition, in young patients, both resting (P = 0.02) and exercise heart rate (P = 0.01) were significantly lower than in controls. Diastolic filling when measured as end-diastolic volume (EVD/sec), was significantly reduced in middle-aged patients (P = 0.04). An impaired peak filling rate (PFR) (<2.5 EDV/sec) was found in 30 patients (54.5%) and 10 controls (27.7%, χ2 = 5.3, P = 0.02): 17 young (53.1%) and 13 middle-aged patients (56.5%). A significant decrease of left ventricular (LV) ejection fraction (EF) at peak exercise was found in both patients groups (P < 0.0001) while LVEF at rest was lower only in middle-aged patients (P = 0.004). An impaired LVEF at rest (<50%) was found in 13 patients (23.6%) and in none of controls (χ2 = 8.1, P = 0.004). The exercise induced changes in LVEF (ΔEF) were significantly lower in both patients groups than in age-matched controls (P < 0.0001). Impaired LVEF response to exercise (<5% increase vs. basal value) was found in 36 patients (65.4%) and in 5 controls (13.8%, χ2 = 21.3, P < 0.000): 21 young (65.6%) and 15 middle-aged patients (65.2%). The peak ejection rate (PER) was also significantly lower in young GHD patients than in controls (P < 0.001). Exercise duration and capacity were significantly reduced in both groups of GHD patients. In the patient group, age was significantly correlated with SBP and DBP levels both at rest (r = 0.612, and r = 0.516, respectively, P < 0.001) and at peak exercise (r = 0.4, P < 0.005 and r = 0.34, P < 0.01, respectively), with exercise duration (r = -0.383, P < 0.005) and capacity (r = -0.355, P = 0.005). Disease duration was also correlated with IGF-I levels (r = -0.319, P < 0.01), SBP levels at peak exercise (r = -0.352, P = 0.005), and LVEF at rest (r = -0.254, P < 0.05). Finally, a significant correlation was found between IGF-I levels and DBP at peak exercise (r = 0.3, P < 0.05) and between GH peak at ARG + GHRH test and LVEF at rest (r = 0.232, P < 0.05). Exercise-induced changes in LVEF were significantly correlated with SBP levels at peak exercise (r = -0.401, P < 0.005), PFR expressed as EDV/sec (r = -0.306, P < 0.05) and SV/sec (r = -0.292, P < 0.05). At multiple regression analysis in the patient group, age was the strongest predictor of SBP both at rest (t = 4.17, P < 0.0001) and at peak exercise (t = 2.32, P = 0.025), and capacity (t = -2.84, P = 0.007). IGF-I levels were the strongest predictor of DBP at peak exercise (t = 2.2, P = 0.03). CONCLUSIONS: Diastolic filling abnormalities and impaired left ventricular ejection fraction response at peak exercise were found in the majority of patients with GHD acquired in adulthood, regardless of the patients age and age of disease onset. On this basis a careful cardiological assessment of GHD adult patients by radionuclide angiography can be helpful in diagnosing early stages of cardiac failure which could then be monitored during GH replacement therapy.
Does the age of onset of growth hormone deficiency affect cardiac performance? A radionuclide angiography study
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Does the age of onset of growth hormone deficiency affect cardiac performance? A radionuclide angiography study
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