A 37-year-old woman presents with complaints of severe heaburn with or without meals. She has a history of hypeension, which has been treated with captopril. She also has a history of Raynaud disease, multiple facial telangiectasias, and very taut skin on the dorsum of both hands. She has failed to obtain relief for her heaburn with large doses of antacids, or omeprazole. Esophageal manometry is ordered. Most likely results of this test is