A nurse is performing a cardiac assessment on a client and auscultates an S3 sound. The nurse should recognize that this sound represents which of the following heart conditions?

A headache is a common and expected adverse effect of nitroglycerin, due to its vasodilating action. The client can take an over-the-counter analgesic to relieve the headache, unless contraindicated.

"A headache is an indication of an allergy to the medication." is not correct, as a headache is not a sign of an allergic reaction to nitroglycerin. An allergic reaction would manifest as rash, itching, swelling, or difficulty breathing.

"A headache indicates tolerance to the medication." is not accurate, as a headache does not indicate tolerance to nitroglycerin. Tolerance would manifest as reduced or absent relief from anginal pain.

"A headache is likely due to the anxiety about the chest pain." is not plausible, as a headache is not likely due to the anxiety about the chest pain. Anxiety would manifest as nervousness, restlessness, palpitations, or sweating.

Performing neurovascular checks with vital signs is an important action to take following a cardiac catheterization accessed through the femoral artery, as it can help monitor for complications such as bleeding, hematoma, infection, thrombosis, or embolism. The nurse should assess the color, temperature, sensation, movement, and pulses of the affected leg, as well as the blood pressure, heart rate, and oxygen saturation of the client.

Instructing the client to perform range-of-motion exercises to his lower extremities is not appropriate, as it can increase the risk of bleeding or dislodging the arterial sheath or closure device. The client should keep the affected leg straight and avoid bending or lifting it for several hours after the procedure, or as directed by the provider.

Restricting the client's fluid intake is not necessary, as fluid intake can help prevent dehydration and contrast- induced nephropathy following a cardiac catheterization. The client should be encouraged to drink fluids, unless contraindicated.

dAmbulating the client 1 hr following the procedure is not advisable, as it can cause bleeding, hematoma, or vascular injury. The client should remain on bed rest for 2 to 6 hours after the procedure, or as directed by the provider, and resume ambulation gradually and with assistance.