الفهرس 
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Abstract
This cohort study was conducted on 100 ESRD patients on regular hemodialysis at Ain Shams University Hospitals in the year 2016-2017. Patients were divided into two groups according to interdialytic weight gain (IDWG):
group I (high IDWG):50 patients with absolute weight gain 4 kg or more or relative IDWG more than 3.5% of total body weight.
group II (low IDWG): 50 patients with absolute weight gain less than 3 kg or relative IDWG less than 3.5% of total body weight.
Interdialytic weight gain (IDWG), which corresponds to ultrafiltration losses during hemodialysis (HD), is the result of salt and water ingestion minus urine output between two consecutive dialysis sessions.
In this study we found that:
● IDWG is significantly associated with increases in blood pressure (BP) and left ventricular hypertrophy (LVH), both of which can increase the risk of cardiovascular mortality in patients with end-stage renal disease. In low IDWG group, there was a significant correlation between left ventricular mass index after one year of the study and Hb and EF BIP with ferritin, while in high IDWG group, there were a high significant correlation between EF BIP after one year of the study with (ferritin, k, and Na).
● There was a significant correlation between left ventricular mass index after one year of the study with (Hb, ferritin and PTH).
● LVH in patients with ESRD is associated with mortality and incident cardiovascular events independently of base line LVM and of traditional and emerging risk factors. This finding indicates that monitoring LVM by echocardiography provides significant prognostic information respect to a single estimate of LVM and suggests that repeated measurements may be useful in clinical practice in the management of ESRD patients. LVH is perhaps the most important cardiovascular complications in patients with chronic renal failure.
● In low IDWG group, there was statistically a significant difference between values at the start of the study and after one year regarding IVS, while in high IDWG group, there were statistically high significant differences between values at the start of the study and after one year regarding IVS, EDV, EF BIP, LA, IVC and left ventricular mass index and significant differences regarding PW