Figure 4From: Focused cardiac ultrasound: a training course for pediatric intensivists and emergency physicians Valvular regurgitation. A- Mild MR by color Doppler (apical 4-chamber view). B- Moderate TR by color Doppler (apical 4-chamber view). LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle.Back to article page