Mode
Text Size
Log in / Sign up

ASVmv reduces nocturnal hypoxemic burden in AMI patients with sleep-disordered breathingEarly study links sleep treatment to less oxygen drop in heart attack patients

AI-generated summary of the cited source, checked by automated accuracy review. How we work

Key Takeaway
Consider that ASVmv may reduce nocturnal hypoxemia in AMI patients with sleep-disordered breathing, but findings are exploratory.

This was an ancillary analysis of a multicenter, randomized, open-label trial. The population included 35 patients with first-time acute myocardial infarction (AMI) and sleep-disordered breathing (apnea-hypopnea index ≥15 events h-1). Patients were randomized to minute-ventilation triggered adaptive servo-ventilation (ASVmv) or standard care alone.

During the ASVmv treatment initiation night, T90 (time in bed with SpO2 < 90%) was significantly reduced compared to baseline (effect size 9.25% [1.34-16.32] vs. 0.03% [0.00-1.72], p = .003). T90desaturation and T90non-specific were also significantly reduced (p < .001 for both). At 12 weeks, median T90desaturation was lower in the ASVmv group (0.10% [0.00-0.40]) than the control group (0.40% [0.22-1.80], p = .020). No significant difference was found for T90non-specific at 12 weeks.

T90 was positively associated with infarct size (rs = 0.437, p = .023), as was T90non-specific (rs = 0.424, p = .028). Safety data, including adverse events and discontinuations, were not reported.

Key limitations include the exploratory nature of the findings, which should be regarded as hypothesis generating. The small sample size (35 patients) and lack of reported safety data limit clinical interpretation. Practice relevance was not reported.

This research looked at patients who had their first heart attack and also had sleep-disordered breathing, a condition where breathing stops or becomes shallow during sleep. The study involved 35 individuals who were divided into two groups: one received minute-ventilation triggered adaptive servo-ventilation (ASVmv), while the other received standard care alone. The primary goal was to see if the ventilator could lower the time spent with low blood oxygen levels, known as nocturnal hypoxemic burden.

During the first night of treatment, the group using the ventilator showed a significant reduction in low oxygen time compared to their own baseline measurements. Over a follow-up period of 12 weeks, those receiving the ventilator still had lower levels of severe oxygen drops compared to the control group. The study also noted an association between low oxygen levels and the size of the heart attack area, suggesting these oxygen drops might be linked to heart damage.

The researchers emphasized that these findings are exploratory and should be viewed as hypothesis-generating rather than definitive proof. Because the study was small and part of a larger trial, the results cannot yet change medical practice or guarantee better outcomes for all patients. Readers should understand that while the initial data looks promising, more research is needed to confirm if this treatment truly improves long-term heart health.

What this means for you:
Small early study suggests ventilator may reduce low oxygen in heart attack patients, but more research is needed.

Study Details

Study typeRct
EvidenceLevel 2
PublishedApr 2026
View Original Abstract ↓
STUDY OBJECTIVES: In patients with acute myocardial infarction (AMI), early use of minute-ventilation triggered adaptive servo-ventilation (ASVmv) for sleep-disordered breathing has been proposed as a therapeutic intervention to reduce infarct expansion. This study aims to assess the efficacy of ASVmv in modulating nocturnal hypoxemic burden and evaluate its association with infarct size. METHODS: This ancillary analysis of the multicenter, randomized, open-label TEAM-ASV I trial included patients with first-time AMI and sleep-disordered breathing, defined by an apnea-hypopnea index ≥ 15 events h-1 assessed with polygraphy. Infarct size was quantified via cardiac magnetic resonance imaging. Nocturnal hypoxemic burden was quantified by the time in bed spent with oxygen saturation below 90% (T90) and further decomposed into desaturation-related components (T90desaturation) and non-specific drifts (T90non-specific). RESULTS: Thirty-five patients with infarct size 15.5 ± 6.9% of left ventricular mass were randomized to early ASVmv treatment in addition to standard care of AMI (n = 16) and standard care alone (control, n = 19). Compared with baseline, all components of hypoxemic burden, T90 (9.25% [1.34-16.32] vs. 0.03% [0.00-1.72; p = .003]), T90desaturation (0.72% [0.49-7.97] vs. 0.00% [0.00-0.06]; p < .001), and T90non-specific (4.75% [0.38-10.30] vs. 0.00% [0.00-1.73]; p < .001) were significantly reduced during the ASVmv treatment initiation night. After 12 weeks, ASVmv treatment showed lower median T90desaturation compared to the control group (ASVmv: 0.10% [0.00-0.40] vs. control: 0.40% [0.22-1.80]; p = .020) but not T90non-specific. T90 (rs = 0.437, p = .023) and its component, T90non-specific, were both associated with infarct size (rs = 0.424; p = .028). CONCLUSIONS: ASVmv treatment suppresses the sleep apnea-related nocturnal hypoxemic burden following AMI. Higher T90, particularly non-specific drifts in SpO₂, were associated with larger infarct size. These findings are exploratory and should be regarded as hypothesis generating. CLINICAL TRIAL REGISTRATION: NCT02093377.
Free Newsletter

Clinical research that matters. Delivered to your inbox.

Join thousands of clinicians and researchers. No spam, unsubscribe anytime.