Dyspnea

Objective To identify the most accurate clinical examination, radiographic, and laboratory findings for assessing volume overload in nonintubated patients.

Data Sources and Study Selection MEDLINE was searched (1946 to January 6, 2026) to identify peer-reviewed English-language studies about the diagnostic accuracy of the clinical examination of spontaneously breathing patients with intravascular volume overload.

Data Extraction and Synthesis Three authors independently extracted data for each finding and calculated sensitivity, specificity, and likelihood ratios (LRs). A 2-level mixed logistic regression model was used to pool estimates.

Results Forty studies, involving 11 490 adult patients, were included, with a prevalence of volume overload of 35% to 69%. Thirty-three of those studies evaluated patients with dyspnea. Prevalence of volume overload was more likely when the physical examination revealed jugular venous distention with the highest point of pulsation more than 3 cm in a vertical line above the sternal angle (LR, 4.1 [95% CI, 2.9-5.6]; specificity, 92%), lower extremity edema (LR, 2.2 [95% CI, 1.5-3.1]; specificity, 80%), or crackles on auscultation (LR, 2.7 [95% CI, 1.7-4.5]; specificity, 81%). Vascular congestion on chest radiography increased the likelihood of intravascular volume overload (LR, 5.9 [95% CI, 2.9-12.0]; specificity, 91%). Point-of-care ultrasonography that identified bilateral pulmonary B-lines suggested volume overload (LR, 4.0 [95% CI, 2.6-6.1]; specificity, 77%), and absence of pulmonary B-lines made volume overload unlikely (LR, 0.09 [95% CI, 0.04-0.23]; sensitivity, 93%). Inferior vena cava collapsibility index of less than 50% increased the likelihood of volume overload (LR, 3.9 [95% CI, 2.5-6.1]; specificity, 79%), and a collapsibility index of at least 50% made it less likely (LR, 0.22 [95% CI, 0.11-0.45]; sensitivity, 82%). Point-of-care ultrasonographic measurement of jugular venous pressure (JVP; >8 cm) also increased the likelihood of volume overload (LR, 2.8 [95% CI, 2.2-3.5]; specificity, 71%), although JVP of 8 cm or less identified patients less likely to have volume overload (LR, 0.26 [95% CI, 0.20-0.33]; sensitivity, 81%). A plasma brain-type natriuretic peptide (BNP) level of 100 ng/mL or higher was the single best test to identify those most likely to have volume overload (LR, 6.9 [95% CI, 2.4-20.4]; specificity, 87%), and a normal value made it less likely (LR, 0.14 [95% CI, 0.08-0.24]; sensitivity, 87%).

Conclusions and Relevance A BNP level of 100 ng/mL or higher and presence of vascular congestion on chest radiography may be the most useful tests to identify patients with volume overload. Absence of pulmonary B-lines using point-of-care ultrasonography or BNP levels of less than 100 ng/mL may be most useful to exclude volume overload.

Author/s:

Benjamin Drum, Bryce La Course, Mark Kelly

Tilt Table Testing

Alex Haga — Tue, 23 Apr 2024 17:41:24 +0000

Date Added:

April 23, 2024

Journal/Publication:

JAMA

Publisher:

JAMA

Publication Date:

April 11, 2024

URL:

Tilt Table Testing

Type:

Meta-analyses, Reviews, and Guidelines

Format:

Article

DOI (1):

10.1001/jama.2024.0004

Keywords

Cardiac Catheterization

PMID (1):

38602671

MeSH

hydrocortisone

Methacholine Chloride

Cardiac Catheterization

A summary and example of how to use tilt table testing in patients with syncope and various other fairly common symptoms. James W. Mold, MD, MPH

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A 43-year-old woman presented with a 1-year history of recurring symptoms of sudden onset of fatigue, palpitations, dyspnea, chest pain, lightheadedness, and nausea that were associated with standing and resolved with sitting. These symptoms began 1 month after mild COVID-19 infection. At presentation, while supine, blood pressure (BP) was 123/70 mm Hg and heart rate (HR) was 90/min; while seated, BP was 120/80 and HR was 93/min; after standing for 1 minute, BP was 124/80 and HR was 119/min. Physical examination results were normal. Oxygen saturation was 98% at rest while breathing room air. She had no oxygen desaturation during a 6-minute walk test but walked only 282 m (45% predicted). Complete blood cell count, morning cortisol, and thyrotropin blood levels were normal. Electrocardiogram (ECG), chest computed tomography, pulmonary function testing, methacholine challenge, bronchoscopy, echocardiography, and cardiac catheterization findings were normal. During tilt table testing, the patient experienced lightheadedness and nausea when moved from horizontal to the upright position. Results of the tilt table test are shown in the Table and Figure.

Author/s:

Chesire, W.P., Dudenkov, D.V., Munipalli, B.