Task: Answer Verification
Input (English): Question: Does [ Sildenafil change coronary flow reserve in diabetics with erectile dysfunction ]?
Answer: Diabetics with erectile dysfunction often have a CFR in the lower range of normal. Sildenafil did not further reduce CFR. Asymptomatic, severe coronary artery disease often can be found in diabetics with erectile dysfunction. Cardiological screening for contraindications for sildenafil seems mandatory in diabetics with a high cardiovascular risk profile.
Output (English): no