title: [Hemodialysis improves the subendocardial viability ratio].
abstract: The subendocardial viability ratio (SEVR), a parameter introduced by Buckberg, represents a non-invasive measure of myocardial perfusion related to left ventricular work. AIM. The aim of this study was to verify if dialysis may determine modifications of SEVR and how these modifications are modulated in the 2-day interdialytic period. METHODS.We studied 54 subjects of mean age 6314 years and receiving dialysis for 3215 months. Exclusion criteria were diabetes, resistant hypertension and peripheral vascular diseases and intradialytic hypotension evidenced during the study dialysis session. Pulse wave velocity and SEVR assessments were performed during the third dialysis session of the week, before (pre-HD) and after (post-HD) dialysis, in 2-day interdialytic period after and at the beginning of the following dialysis session. RESULTS.Dialysis reduces PWV, in particular the tertile with the lowest PWV presents the highest percentage reduction (-26%) compared with the second and the third tertiles. In the same way, dialysis leads to an increase of SEVR and patients in the tertile with the highest SEVR values maintain high SEVR values during dialysis and in the interdialytic period. Patients with severe vascular calcifications present higher PWV value and lower SEVR value. CONCLUSIONS.The results of present study demonstrate that ultrafiltration improves PWV (with a mean reduction of 16%) and SEVR (increase of 13%) and that the severity of vascular calcifications influences the effect of ultrafiltration on these two parameters. More studies are certainly necessary to verify our findings. Considered the higher mortality of patients with higher SEVR, it would be important to understand if new dialytic strategies are needed in patients with higher PVW and lower SEVR values.
authors.forename: Antonella
authors.initials: A
authors.lastname: De Blasio
authors.forename: Maria
authors.initials: M
authors.lastname: Sirico
authors.forename: Lucia
authors.initials: L
authors.lastname: Di Micco
authors.forename: Biagio
authors.initials: B
authors.lastname: Di Iorio
mesh_terms: D004699:Endocardium / Q000503:physiopathology*; D005260:Female; D006334:Heart Function Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis