A 19-year-old male with a history of a bicuspid aortic valve…

A 19-yeаr-оld mаle with а histоry оf a bicuspid aortic valve presents for an echocardiogram to evaluate suspected aortic coarctation. To accurately quantify the maximum hemodynamic severity of the obstruction, the sonographer must measure peak and mean pressure gradients across the narrowing. Which of the following imaging windows and Doppler techniques will provide the most parallel alignment to obtain these maximum velocities according to clinical guidelines?