Blood pressure abnormalities in children with sickle cell anemia

Area of Science:

• Nephrology
• Pediatrics
• Hematology

Background:

• Kidney disease is a significant cause of illness and death in sickle cell anemia (SCA) patients.
• Factors influencing renal disease progression in pediatric SCA patients remain unclear.
• Blood pressure alterations, like hypertension and absent nocturnal dip, are implicated in other kidney diseases and may affect SCA.

Purpose of the Study:

• To investigate the relationship between microalbuminuria and nocturnal blood pressure dipping in adolescents with SCA.
• To identify other factors associated with microalbuminuria in this population.

Main Methods:

• A prospective study involving 52 adolescents with SCA.
• 24-hour ambulatory blood pressure monitoring and microalbuminuria assessment.
• Stepwise logistic regression to identify independent factors associated with microalbuminuria.

Main Results:

• 35% of patients had unrecognized hypertension; 17% had pre-hypertension.
• 56% of patients lacked a normal nocturnal blood pressure dip.
• 21% had microalbuminuria, with significantly less nocturnal dipping compared to those without (P=0.01).

Conclusions:

• Blood pressure abnormalities are prevalent in adolescents with SCA.
• Reduced nocturnal blood pressure dipping is associated with microalbuminuria.
• These blood pressure issues may be modifiable risk factors for sickle cell nephropathy progression.