Longitudinal Assessment of Left Ventricular Mass in Autosomal Dominant Polycystic Kidney Disease

Area of Science:

• Nephrology
• Cardiology
• Genetics

Background:

• Autosomal dominant polycystic kidney disease (ADPKD) significantly increases cardiovascular morbidity and mortality, primarily due to hypertension and left ventricular hypertrophy.
• While blood pressure reduction can decrease left ventricular mass in ADPKD patients, the factors influencing this response remain unclear.

Purpose of the Study:

• To identify predictors and moderators of left ventricular mass index (LVMI) response to intensive blood pressure control in patients with autosomal dominant polycystic kidney disease (ADPKD).

Main Methods:

• A post-hoc analysis of the HALT PKD study, a randomized controlled trial involving hypertensive ADPKD patients (age 15-49, eGFR > 60 ml/min/1.73 m²).
• Predictors analyzed included age, sex, baseline eGFR, systolic blood pressure, total kidney volume, and various urine/serum markers.
• Left ventricular mass index (LVMI) was assessed via MRI over 60 months.

Main Results:

• Higher baseline systolic blood pressure and larger total kidney volume were significantly associated with LVMI reduction, irrespective of blood pressure treatment assignment.
• Male sex and lower baseline estimated glomerular filtration rate (eGFR) were linked to a positive annual slope in LVMI, indicating less reduction.

Conclusions:

• In ADPKD, characteristics associated with higher disease progression risk (elevated systolic blood pressure, larger kidney volume, lower eGFR) correlate with greater LVMI improvement under intensive blood pressure management.
• Male sex is associated with a diminished rate of LVMI reduction in response to blood pressure lowering strategies.