Changes in left ventricular hypertrophy and function in hypertensive patients started on continuous ambulatory peritoneal dialysis
Related Experiment Videos
Insights
Continuous ambulatory peritoneal dialysis (CAPD) improves hypertension control, reducing left ventricular (LV) mass and improving LV function. This study shows CAPD benefits cardiac structure and performance in hypertensive patients.
Area of Science:
- Nephrology
- Cardiology
- Hypertension Management
Background:
- Hypertension is a significant risk factor for left ventricular (LV) hypertrophy and dysfunction.
- Continuous ambulatory peritoneal dialysis (CAPD) is known to improve blood pressure control in patients with end-stage renal disease.
- The impact of CAPD-induced blood pressure normalization on LV structure and function requires further investigation.
Purpose of the Study:
- To evaluate the effects of improved blood pressure control via CAPD on left ventricular (LV) hypertrophy and LV function.
- To assess changes in LV anatomy and performance in hypertensive patients undergoing CAPD.
Main Methods:
- A prospective study followed 18 hypertensive patients initiating CAPD for 6-12 months.
- M-mode echocardiography was used to assess LV mass, wall thickness, dimensions, fractional shortening, and ejection fraction.
- Blood pressure was monitored throughout the study period.
Main Results:
- CAPD led to a decrease in blood pressure in 12 out of 18 patients.
- LV mass decreased in 15 patients, with reductions in wall thickness and LV dimensions.
- LV dimensions normalized in six patients, and LV function (fractional shortening and ejection fraction) improved in three of four patients with initial deficits.
Conclusions:
- CAPD effectively reduces left ventricular hypertrophy by addressing both pressure and volume overload.
- CAPD may prevent the decline of LV function in patients with preserved function and improve it in those with impaired function.
- CAPD offers significant cardiovascular benefits beyond renal replacement therapy in hypertensive patients.
Abstract:
Continuous ambulatory peritoneal dialysis (CAPD) often leads to better control of hypertension. In order to evaluate the effects of such improved blood pressure control on left ventricular (LV) hypertrophy and LV function, a group of 18 patients with a history of hypertension were followed for changes in LV anatomy and function (with M-mode echocardiography) over a 6 to 12 month period after initiation of CAPD. All patients had echocardiographic evidence of increased LV mass related to concentric and eccentric hypertrophy. On CAPD, blood pressure decreased (greater than 5 mm Hg) in 12 patients. LV mass decreased in 15 patients and increased in one. A decrease in both wall thickness and LV dimension contributed to the fall in LV mass on CAPD. Initially, LV dimension exceeded normal in 9 out of 18 patients. On CAPD, LV dimension decreased to near normal in size in six, and no patient developed LV dilation on CAPD. Four patients initially had a decreased fractional shortening and ejection fraction; three of these normalized while on CAPD and no patient deteriorated. These results indicate that CAPD improves LV hypertrophy by normalizing both volume and pressure overload. These effects may prevent deterioration in LV function in patients with still normal LV function, and may improve LV function in patients who already exhibit decreased LV performance.