A multicenter evaluation of the HeartMate 3 risk score.

BACKGROUND: The Heartmate 3 (HM3) risk score (HM3RS) was derived and validated internally from within the Multicenter Study of MagLev Technology in Patients Undergoing Mechanical Circulatory Support Therapy with HeartMate 3 (MOMENTUM 3) trial population and provides 1- and 2-year mortality risk prediction for patients in those before HM3 left ventricular assist device (LVAD) implantation. We aimed to evaluate the HM3RS in nontrial unselected patients, including those not meeting inclusion criteria for MOMENTUM 3 trial enrollment. METHODS: Patients who underwent HM3 LVAD implant at 1 of 7 US centers between 2017 and 2021, with at least 1-year follow-up, were included in this analysis. Patients were retrospectively assessed for their eligibility for the MOMENTUM 3 trial based on study inclusion and exclusion criteria. HM3RS risk discrimination was evaluated using time-dependent receiver operating characteristic curve analysis for 1-year mortality for all patients and further stratified by MOMENTUM 3 trial eligibility. Kaplan-Meier curves were constructed using the HM3RS-based risk categories. RESULTS: Of 521 patients included in the analysis, 266 (51.1%) would have met enrollment criteria for MOMENTUM 3. The 1- and 2-year survival for the total cohort was 85% and 81%, respectively. There was no statistically significant difference in survival between those who met and did not meet enrollment criteria at 1 (87% vs 83%; p = 0.21) and 2 years postimplant (80% vs 78%; p = 0.39). For the total cohort, HM3RS predicted 1-year survival with an area under the curve (AUC) of 0.63 (95% confidence interval [CI]: 0.57-0.69, p < 0.001). HM3RS performed better in the subset of patients meeting enrollment criteria: AUC 0.69 (95% CI:0.61-0.77, p < 0.001) compared to the subset that did not: AUC 0.58 (95% CI: 0.49-0.66, p = 0.078). CONCLUSIONS: In this real-world evidence, multicenter cohort, 1- and 2-year survival after commercial HM3 LVAD implant was excellent, regardless of trial eligibility. The HM3RS provided adequate risk discrimination in "trial-like" patients, but predictive value was reduced in patients who did not meet trial criteria.

Ventricular assist devices and sleep-disordered breathing-A mechanical heart stimulating a sleepy brain.

Sleep-disordered breathing, including obstructive sleep apnea (OSA) and central sleep apnea (CSA), is common in severe heart failure (HF) patients. There is limited data on the effect of left ventricular assist devices (LVAD) on sleep apnea. We performed a retrospective review of 350 durable LVAD patients and found 5 with a history of pre- and post-LVAD sleep studies. All five patients had OSA, and three had concomitant CSA. We observed reduced apnea-hypopnea index following LVAD placement. This was due to a near abolishment of CSA in three mixed sleep apnea patients-as seen by a central apnea index improvement from an average of 25.9 ± 13.1 to 1.4 ± 2.5 events per hour (p = 0.063). LVAD placement was associated with an increase in thermodilution cardiac output from 2.7 ± 0.6 to 4.1 ± 1.1 L/min (p = 0.014). These findings support chemoreception physiology seen in patients with poor circulation and the effect of restoring this circulation with LVAD support.

Right Ventricular Contractility and Pulmonary Arterial Coupling After Less Invasive Left Ventricular Assist Device Implantation.

Right ventricular failure contributes significantly to morbidity and mortality after left ventricular assist device implantation. Recent data suggest a less invasive strategy (LIS) via thoracotomy may be associated with less right ventricular failure than conventional median sternotomy (CMS). However, the impact of these approaches on load-independent right ventricular (RV) contractility and RV-pulmonary arterial (RV-PA) coupling remains uncertain. We hypothesized that the LIS approach would be associated with preserved RV contractility and improved RV-PA coupling compared with CMS. We performed a retrospective study of patients who underwent durable, centrifugal left ventricular assist device implantation and had paired hemodynamic assessments before and after implantation. RV contractility (end-systolic elastance [Ees]), RV afterload (pulmonary effective arterial elastance [Ea]), and RV-PA coupling (Ees/Ea) were determined using digitized RV pressure waveforms. Forty-two CMS and 21 LIS patients were identified. Preimplant measures of Ees, Ea, and Ees/Ea were similar between groups. After implantation, Ees declined significantly in the CMS group (0.60-0.40, p = 0.008) but not in the LIS group (0.67-0.58, p = 0.28). Coupling (Ees/Ea) was unchanged in CMS group (0.54-0.59, p = 0.80) but improved significantly in the LIS group (0.58-0.71, p = 0.008). LIS implantation techniques may better preserve RV contractility and improve RV-PA coupling compared with CMS.

Cardiac output assessment methods in left ventricular assist device patients: A problem of heteroscedasticity.

Equipoise remains about how best to measure cardiac output (CO) in patients with left ventricular assist devices (LVAD). In this study, direct Fick CO was compared with thermodilution (TD) and indirect Fick (iFick) CO in 61 LVAD patients. TD and LaFarge iFick showed moderate correlation with direct Fick (R2 = 0.49 and R2 = 0.38, p < 0.001 for both), while Dehmer and Bergstra iFick showed poor correlation with direct Fick (R2 = 0.29 and R2 = 0.31, p < 0.001 for both). Absolute bias between all CO estimation techniques and direct Fick CO was lowest for TD compared to iFick methods but significant for all methods. All methods tended to overestimate CO compared to direct Fick, with greatest overestimation present in those with the lowest measured direct Fick CO. Bias and frequency of significant discrepancy were least using TD and Lafarge iFick CO estimation methods in this study, with TD CO demonstrating modestly better correlation and less heteroscedasticity compared to Lafarge.

Outcomes in Patients With LVADs Undergoing Simultaneous Heart-Kidney Transplantation.

BACKGROUND: Multiple studies have shown better outcomes for simultaneous heart-kidney transplant (sHKT) than for isolated orthotopic heart transplant (iOHT) in recipients with chronic kidney disease (CKD). However, outcomes in patients supported by durable left ventricular assist devices (LVADs) have not been well studied. METHODS: Patients with durable LVADs and stage 3 or higher CKD (eGFR < 60 mL/min/1.73 m2) undergoing iOHT or sHKT between 2008 and 2020 were identified from the United Network for Organ Sharing registry. A Kaplan-Meier survival analysis with associated log-rank test was conducted to compare post-transplant survival rates. Multivariable modeling was used to identify risk-adjusted predictors of 1 year post-transplant mortality. RESULTS: We identified 4375 patients; 366 underwent sHKT, and 4009 underwent iOHT. The frequency of sHKT increased during the study period. The 1-year post-transplant survival rate was worse in patients after sHKT than in patients after iOHT (80.3% vs 88.3%; P < 0.001) and persisted up to 5 years post-transplant (P = 0.001). sHKT recipients were more likely to require dialysis after transplantation and had longer hospital lengths of stay (P < 0.001). Multivariable analysis showed that sHKT remained an independent risk factor for mortality at 1 year (OR 1.58; P = 0.002). CONCLUSIONS: sHKT is becoming more common in patients with durable LVADs. Compared with iOHT, patients with sHKTs have worse short- and long-term survival rates and are more likely to require post-transplant dialysis.

Factors Associated with Adherence to the Mediterranean Diet and Dietary Habits among University Students in Lebanon.

Although the Mediterranean Diet has been acknowledged as the best overall diet for the year 2020, it has seen a decrease in its adherence over the past years. This is due to several reasons, one of which is the gradual shift to a more westernized diet with all the influences that occur especially on university students whose dietary choices set a path for future dietary habits. The aim of this study is to check the level of adherence to the Mediterranean Diet and frequency of breakfast consumption among university students in Lebanon and check whether they are influenced by sociodemographic, anthropometric, dietary knowledge, or academic data. A cross-sectional questionnaire was electronically sent to randomly selected students (210 females and 93 males) from different universities across Lebanon, aged between 18 and 25 years old. The questionnaire was filled online, and all data were self-reported. The Mediterranean Diet Quality Index (KIDMED) was used as a tool to evaluate adherence to the Mediterranean Diet. The results showed that 18.8% of respondents had high adherence to the Mediterranean Diet. Students who reported always consuming breakfast and not skipping meals had significantly higher adherence to the MD. Furthermore, students with lower BMI and higher KIDMED scores had significantly more correct answers on the nutritional knowledge questions. In addition, there was a significant difference in the average KIDMED scores between different GPA categories, most notably when comparing high and poor MD adherence; students with excellent GPA scores had higher adherence to the MD than those with poor GPA scores. In conclusion, nutrition awareness in a university setting is very important since it may positively affect academic outcomes and may be the last chance to teach and engrave healthy eating patterns to a large scale of students.

The Impact of a High-risk Psychosocial Assessment on Outcomes After Durable Mechanical Circulatory Support.

Patient adherence is vital to the success of durable mechanical circulatory support (MCS), and the pre-MCS assessment of adherence by the multidisciplinary advanced heart failure team is a critical component of the evaluation. We assessed the impact of a high-risk psychosocial assessment before durable MCS implantations on post-MCS outcomes. Between January 2010 and April 2018, 319 patients underwent durable MCS at our center. We excluded those who died or were transplanted before discharge. The remaining 203 patients were grouped by pre-MCS psychosocial assessment: high-risk (26; 12.8%) versus acceptable risk (177; 87.2%). We compared clinical characteristics, nonadherence, and outcomes between groups. High-risk patients were younger (48 vs. 56; p = 0.006) and more often on extracorporeal membrane oxygenation at durable MCS placement (26.9% vs. 9.0%; p = 0.007). These patients had a higher incidence of post-MCS nonadherence including missed clinic appointments, incorrect medication administration, and use of alcohol and illicit drugs. After a mean follow-up of 15.3 months, 100% of high-risk patients had unplanned hospitalizations compared with 76.8% of acceptable-risk patients. Per year, high-risk patients had a median of 2.9 hospitalizations per year vs. 1.2 hospitalizations per year in acceptable-risk patients. While not significant, there were more driveline infections over the follow-up period in high-risk patients (27% vs. 14.7%), deaths (27% vs. 18%), and fewer heart transplants (53.8% vs. 63.8%).The pre-MCS psychosocial assessment is associated with post-MCS evidence of nonadherence and unplanned hospitalizations. Attention to pre-MCS assessment of psychosocial risk factors is essential to optimize durable MCS outcomes.