Key result
Hypocapnia (pCO2 ≤ 30 mmHg) on admission was associated with a significantly increased risk of 1-year all-cause mortality (HR 2.2) in patients with acute heart failure.
Why the study?
The study aimed to examine the prevalence of hyperventilation defined by pCO 2 value among acute heart failure patients and link it with potential triggers and prognosis.
Does hypocapnia (low pCO2) predict mortality and rehospitalization in patients with acute heart failure?
Observational (n=241)
No
Does hypocapnia (low pCO2) predict mortality and rehospitalization in patients with acute heart failure?
Hazard Ratio: 2.2 (95% CI 1.3–3.6)
p-value: p=0.002
Hypocapnia (pCO2 ≤ 30 mmHg) is relatively common in acute heart failure and is a strong predictor of long-term mortality and heart failure rehospitalization, likely reflecting tissue hypoperfusion.
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Hypocapnia may identify higher-risk acute HF patients; leaves open its added value for risk stratification.
Garus et al. (2022) conducted an observational in Acute heart failure (n=241). Hypocapnia (pCO2 ≤ 30 mmHg) vs. Normal pCO2 (pCO2 > 30 mmHg) was evaluated on 1-year all-cause mortality (HR 2.2, 95% CI 1.3-3.6, p=0.002). Hypocapnia (pCO2 ≤ 30 mmHg) on admission was associated with a significantly increased risk of 1-year all-cause mortality (HR 2.2) in patients with acute heart failure.
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