Final answer:
The primary pulsed-wave mitral valve Doppler diastolic abnormality in a patient with systemic hypertension is stage C. III.
Step-by-step explanation:
The primary pulsed-wave mitral valve Doppler diastolic abnormality in a patient with systemic hypertension is stage C. III.
This is because systemic hypertension can lead to hypertrophic cardiomyopathy, which is characterized by the thickening of the left ventricular myocardium.
This thickening can impair the relaxation of the left ventricle during diastole, resulting in delayed and prolonged filling of the left ventricle. This abnormality can be detected using pulsed-wave Doppler imaging of the mitral valve.