A single open sea air dive increases pulmonary artery pressure and reduces right ventricular function in professional divers
| Autor: | Ante Obad, Zoran Valic, Alf O. Brubakk, Željko Dujić, Ivan Palada |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
medicine.medical_specialty Cardiac output Time Factors Valsalva Maneuver Physiology Decompression Diving Ventricular Dysfunction Right Blood Pressure Pulmonary Artery Physiology (medical) Internal medicine medicine.artery medicine Embolism Air Humans Ventricular outflow tract Orthopedics and Sports Medicine Lung diving pulmonary artery pressure professional cardiac output gas bubbles business.industry Public Health Environmental and Occupational Health General Medicine Stroke volume medicine.disease Echocardiography Doppler medicine.anatomical_structure Ventricle Anesthesia Pulmonary artery Ventricular Function Right Cardiology Patent foramen ovale Vascular resistance Vascular Resistance business |
| Zdroj: | European Journal of Applied Physiology. 97:478-485 |
| ISSN: | 1439-6327 1439-6319 |
| Popis: | After decompression from dives, bubbles are frequently observed in the right ventricular outflow tract and may lead to vascular damage, pulmonary arterial hypertension and right ventricular overload. No data exist on the effect of open sea diving on the pulmonary artery pressure (PAP). Eight professional divers performed an open sea air dive to 30 msw. Before and postdive a Doppler echocardiographic study was undertaken. Systolic pulmonary artery pressure (SPAP) was estimated from measurement of peak flow velocity of the tricuspid regurgitant jet ; the ratio between pulmonary artery acceleration times (AccT) and right ventricular ejection time (RVET) was used as an estimate of the mean PAP. No evidence of either patent foramen ovale or intra-pulmonary shunt was found in any subject postdive after performing a Valsalva maneuver. SPAP increased from 25 ± 3 to 33 ± 2 mmHg and AccT/ RVET ratio decreased from 0.44 ± 0.04 to 0.3 ± 0.02 20 min after the dive, respectively. Pulmonary vascular resistance increased from 1.2 ± 0.1 to 1.4 ± 0.1 Woods Units. Postdive right ventricle end-diastolic and endsystolic volumes were increased for about 19% (P = 0.001) and 33% (P = 0.001) and right ejection fraction decreased about for 6% (P = 0.001). Cardiac output decreased from 4.8 ± 0.9 (l min 1) to 4.0 ± 0.6 at 40 min postdive due to decreases in heart rate and stroke volume. This study shows that a single open sea dive may be associated with right heart overload due to increased pressure in the pulmonary artery. |
| Databáze: | OpenAIRE |
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