Elke Platz1, Eldrin F Lewis2, Hajime Uno3, Julie Peck4, Emanuele Pivetta5, Allison A Merz6, Dorothea Hempel7, Christina Wilson8, Sarah E Frasure9, Pardeep S Jhund10, Susan Cheng2, Scott D Solomon2. 1. Department of Emergency Medicine, Brigham and Women's Hospital, Boston, USA Harvard Medical School, Boston, USA eplatz@bwh.harvard.edu. 2. Harvard Medical School, Boston, USA Cardiovascular Division, Brigham and Women's Hospital, Boston, USA. 3. Harvard Medical School, Boston, USA Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, USA. 4. Royal College of Surgeons in Ireland, Dublin, Ireland. 5. Division of Emergency Medicine and High Dependency Unit, Cancer Epidemiology Unit, Department of Medical Sciences, AOU Città della Salute e della Scienza di Torino, Torino, Italy University of Turin, Turin, Italy. 6. Department of Emergency Medicine and Cardiovascular Division, Brigham and Women's Hospital, Boston, USA. 7. Department of Cardiology, Angiology and Intensive Care, University Medical Center Mainz, Mainz, Germany. 8. Department of Emergency Medicine, Massachusetts General Hospital, Boston, USA. 9. Department of Emergency Medicine, Brigham and Women's Hospital, Boston, USA Harvard Medical School, Boston, USA. 10. BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK.
Abstract
AIMS: Pulmonary congestion is a common and important finding in heart failure (HF). While clinical examination and chest radiography are insensitive, lung ultrasound (LUS) is a novel technique that may detect and quantify subclinical pulmonary congestion. We sought to independently relate LUS and clinical findings to 6-month HF hospitalizations and all-cause mortality (composite primary outcome). METHODS: We used LUS to examine 195 NYHA class II-IV HF patients (median age 66, 61% men, 74% white, ejection fraction 34%) during routine cardiology outpatient visits. Lung ultrasound was performed in eight chest zones with a pocket ultrasound device (median exam duration 2 min) and analysed offline. RESULTS: In 185 patients with adequate LUS images in all zones, the sum of B-lines (vertical lines on LUS) ranged from 0 to 13. B-lines, analysed by tertiles, were associated with clinical and laboratory markers of congestion. Thirty-two per cent of patients demonstrated ≥3 B-lines on LUS, yet 81% of these patients had no findings on auscultation. During the follow-up period, 50 patients (27%) were hospitalized for HF or died. Patients in the third tertile (≥3 B-lines) had a four-fold higher risk of the primary outcome (adjusted HR 4.08, 95% confidence interval, CI 1.95, 8.54; P < 0.001) compared with those in the first tertile and spent a significantly lower number of days alive and out of the hospital (125 days vs. 165 days; adjusted P < 0.001). CONCLUSIONS: Pulmonary congestion assessed by ultrasound is prevalent in ambulatory patients with chronic HF, is associated with other features of clinical congestion, and identifies those who have worse prognosis. Published on behalf of the European Society of Cardiology. All rights reserved.
AIMS: Pulmonary congestion is a common and important finding in heart failure (HF). While clinical examination and chest radiography are insensitive, lung ultrasound (LUS) is a novel technique that may detect and quantify subclinical pulmonary congestion. We sought to independently relate LUS and clinical findings to 6-month HF hospitalizations and all-cause mortality (composite primary outcome). METHODS: We used LUS to examine 195 NYHA class II-IV HF patients (median age 66, 61% men, 74% white, ejection fraction 34%) during routine cardiology outpatient visits. Lung ultrasound was performed in eight chest zones with a pocket ultrasound device (median exam duration 2 min) and analysed offline. RESULTS: In 185 patients with adequate LUS images in all zones, the sum of B-lines (vertical lines on LUS) ranged from 0 to 13. B-lines, analysed by tertiles, were associated with clinical and laboratory markers of congestion. Thirty-two per cent of patients demonstrated ≥3 B-lines on LUS, yet 81% of these patients had no findings on auscultation. During the follow-up period, 50 patients (27%) were hospitalized for HF or died. Patients in the third tertile (≥3 B-lines) had a four-fold higher risk of the primary outcome (adjusted HR 4.08, 95% confidence interval, CI 1.95, 8.54; P < 0.001) compared with those in the first tertile and spent a significantly lower number of days alive and out of the hospital (125 days vs. 165 days; adjusted P < 0.001). CONCLUSIONS:Pulmonary congestion assessed by ultrasound is prevalent in ambulatory patients with chronic HF, is associated with other features of clinical congestion, and identifies those who have worse prognosis. Published on behalf of the European Society of Cardiology. All rights reserved.
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