0531. Cumulative effects of negative energy balance on myocardial deformity and diastolic function during the first week of ICU: a pilot study

Methods We made an observational, analytical, prospective, longitudinal pilot study. Dependents variables: LS, echocardiographic parameter used to assess myocardial deformity (contraction). We considered as an improvement an increase ≥10%. E/e ratio, parameter used to assess DF. A reduction of E/e ratio ≥10% was considered DF improvement. I. V,: NEB during the first week of admision. Improvement in the NS: assessed by an increase in at least one level of prealbumin nutritional scale (PNS) after 10 days of receiving 100% of estimated energy (EE) requirements (H. Benedict). (PNS: Normal>18 md/dl, mild undernutrition: 17.9-15, moderate: 14.9-10 severe 100 Hz, for further analysis “of line” of LS. (Blind analysis). Exclusion crit.: nephrotic syndrome, cirrhosis, chronic renal and HF. PCR, MV (PEEP), PVC were recorded.


Objectives
• To evaluate whether a greater negative energy balance (NEB) accumulated during the first week of ICU correlates with worsening in longitudinal Strain (LS) and diastolic function (DF).
• To evaluate whether improvement in the nutritional status (NS) correlates with improvement in LS and DF.

Methods
We made an observational, analytical, prospective, longitudinal pilot study.
Dependents variables: LS, echocardiographic parameter used to assess myocardial deformity (contraction). We considered as an improvement an increase ≥10%.
E/é ratio, parameter used to assess DF. A reduction of E/é ratio ≥10% was considered DF improvement.
I. V,: NEB during the first week of admision. Improvement in the NS: assessed by an increase in at least one level of prealbumin nutritional scale (PNS) after 10 days of receiving 100% of estimated energy (EE) requirements (H. Benedict).
Convenience nonprobability sample. S. analysis: The results were expressed as means with their ST deviations, %. Linear regression (LR) and Fisher test (FT) were used to analyze possible statistics associations, expressed with their CI and p values.
TTE were performed to patients admitted from July to October, 2013, in the first 24 h of admision, at 7th and 10th days of receiving enteral and/or parenteral nutrition with 100% of EE. Acoustic catches are done in HQ digital format, f.r.> 100 Hz, for further analysis "of line" of LS. (Blind analysis).

Figure 1 Longitudinal strain AND BEN
KS test: p = 0.595. We observe a tendency to an inverse relationship (p = 0.375, r = -0.315, N = 10) between NEB and LS but not s. significant. 40% of those who had improvement in at least 1 level of the PNS showed a 10% increase in LV LS at 10 days receiving 100% EE (FT: p = 0.714, OR: 0.667 , 95% CI : 0.025 to 18.059).
As in the Hammer et al study [1], in which acute progressive caloric restriction in young healthy men correlated with impaired DF, we observed a direct relationship (r = 0.462 , p = 0.434 , N = 5) between NEB and E/é, but not s. significant. The 50% who had an improvement in NS showed a 10% reduction in E /é (FT: p = 1.00, OR 1.00 , 95% CI : 0.03 to 29).

Conclusions
Patients with higher cumulative NEB during the first week of ICU had a decrease in LS and an increase in E/é but not s. significant. Given the limitations of this research (being a pilot study of a topic not addressed in ICU with few patients) should be carried further study with sufficient power to test this hypothesis.