Ultrasound Diagnosis of Congestion in the Pulmonary and Systemic Circulations in Patients with Atrial Fibrillation and Chronic Heart Failure
Abstract BackgroundFluid retention is one of the most common reasons for the heart failure decompensation. The purpose of the study is to estimate the sensitivity, specificity of the ultrasound method for evaluating congestive phenomena in the systemic and pulmonary circulations in patients with the atrial fibrillation (AF) and chronic heart failure (CHF).MethodsThe study includes 28 patients with the paroxysmal AF with and without CHF, who were planned for the radiofrequency pulmonary veins isolation. The maximum and minimum diameters of the right superior pulmonary vein and inferior vena cava on exhalation were measured echocardiographically. An average pressure in the right and left atria was measured intraoperatively. Сorrelation between the maximum and minimum diameters of the right superior pulmonary vein and an average pressure in the left atria and between inferior vena cava on exhalation and an average pressure in the right atria was calculated. The sensitivity, specificity of ultrasound methods for evaluating congestive phenomena in the systemic and pulmonary circulations was evaluated.ResultsThere was positive correlation between the minimum diameter of right superior pulmonary vein and invasive mean pressure in the left atrium (R=0.65, P<0.05), between invasive measured mean pressure in the right atrium and the diameter of the inferior vena cava on exhalation (R=0.49, P<0.05). Sensitivity of the method – maximum diameters of the right superior pulmonary vein greater than 21.7 mm are ultrasound criteria for venous pulmonary hypertension is 75%, specificity – 86%. Sensitivity of the method minimum diameters of the right superior pulmonary vein greater than 10.5 mm are ultrasound criteria for venous pulmonary hypertension is 85%, specificity – 86%. The sensitivity of the inferior vena cava diameter exceeding 18,5 mm on exhalation is 100%, the specificity is 92%.ConclusionsThe new ultrasound method of congestion diagnostics in the pulmonary circulation by the maximum and/or minimum diameter of the right superior pulmonary vein can be effectively applied in clinical practice in the same way as the well-known technique of congestion diagnostics in the systemic circulation by the diameter of the inferior vena cava in patients with the atrial fibrillation and chronic heart failure.