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  • Preterm delivery...

Preterm delivery increases risk of hypertension in Young adults, finds study

dr anushaWritten by dr anusha Published On 2021-05-29T09:00:00+05:30  |  Updated On 29 May 2021 4:30 AM GMT
Preterm delivery increases risk of hypertension in Young adults, finds  study
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Among all births 5-18% of deliveries occur preterm all over the world. Apart from cerebral palsy, behavioral problems, hearing and vision impairment; preterm babies are more prone to cardiovascular and metabolic problems in adulthood. In the latest issue of JAMA cardiology, Afifah et al found that preterm-born individuals have higher blood pressure with an increased risk of hypertension by...

Among all births 5-18% of deliveries occur preterm all over the world. Apart from cerebral palsy, behavioral problems, hearing and vision impairment; preterm babies are more prone to cardiovascular and metabolic problems in adulthood. In the latest issue of JAMA cardiology, Afifah et al found that preterm-born individuals have higher blood pressure with an increased risk of hypertension by young adulthood, as well as potentially adverse cardiac remodeling even when normotensive.

Individuals born preterm are at greater relative risk of early heart failure and ischemic heart disease, with risk increasing according to the degree of prematurity. Part of this risk may be attributed to altered cardiac physiology because preterm-born individuals have potentially adverse structural and functional changes across developmental stages from birth to young adulthood. This includes impaired left ventricular (LV) diastolic function, smaller internal LV dimensions, and a greater rate of LV hypertrophy from childhood to young adulthood.

A cross-sectional cohort study was conducted at the Oxford Cardiovascular Clinical Research Facility included 468 adults aged 18 to 40 years. Of these, 200 were born preterm (<37 weeks' gestation) and 268 were born at term (_37 weeks' gestation). Cardiac magnetic resonance imaging was used to characterize LV structure and function, with clinical blood pressure readings measured to assess hypertension status.

Key finding of the study are:

1. Preterm-born individuals without hypertension had smaller LV dimensions and volumes compared with both term-born individuals with and without hypertension.

2. Longitudinal peak systolic strain as well as midventricular and apical peak systolic circumferential strain measures were lower in the preterm born normotensive group compared with term-born individuals with and without hypertension.

3. The association between systolic blood pressure and LV mass index in the adjusted regression models was significant across all groups but was greatest in those born very and extremely preterm.

4. There was a significant, positive association between systolic blood pressure and LV mass to end-diastolic volume ratio in the preterm-born adults but not in term born adults.

As the premature heart transitions to ex utero life it must undergo cellular, structural and functional adaptations to deal with dramatic shift in oxygen and pressure. So considering lower myocardial functional reserve and underlying morphological impairments, it is conceivable that mild blood pressure elevation may have significant cardiac remodeling in this population.

With increasing survival of extreme preterm neonates, it is noteworthy that this group needs lifelong clinical follow up and primary prevention strategies targeting early cardiovascular disease.

Source: Mohamed A, Marciniak M, Williamson W, et al. Association of Systolic Blood Pressure Elevation With Disproportionate Left Ventricular Remodeling in Very Preterm-Born Young Adults: The Preterm Heart and Elevated Blood Pressure. JAMA Cardiol. Published online May 12, 2021. doi:10.1001/jamacardio.2021.0961

preterm deliveryhypertensionLV remodellingextreme pretermrisk of preterm delivery
Source : JAMA Cardiology
dr anusha
dr anusha

    MBBS, M.D. Pediatrics

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