A nurse is caring for a client who has a nasogastric tube. The nurse should monitor the client for which of the following findings?

• Myocardial infarction: The rising troponin levels (Troponin T increasing from 0.08 ng/mL to 0.2 ng/mL and Troponin I rising from 0.01 ng/mL to 0.1 ng/mL) indicate myocardial injury. Persistent chest tightness, shortness of breath, diaphoresis, and anxiety suggest ongoing ischemia. The lack of complete pain relief after nitroglycerin further supports myocardial infarction rather than stable angina.
• Pulmonary embolism: Shortness of breath is a symptom of pulmonary embolism, but the absence of acute hypoxia, pleuritic chest pain, or significant coagulation abnormalities makes this less likely. The client's symptoms and laboratory findings more strongly support a cardiac etiology.
• Bleeding: While thrombolytic therapy increases bleeding risk, the aPTT (32 seconds) and platelet count (350,000/mm³) are within normal limits. There are no reported signs of active bleeding, such as hypotension, bruising, or hematuria, making this a less relevant immediate concern.
• Shortness of breath: Often present in myocardial infarction due to decreased cardiac output and pulmonary congestion. The combination of chest pain, diaphoresis, and dyspnea suggests worsening ischemia rather than a primary pulmonary process. However, it is a nonspecific symptom that can also indicate pulmonary embolism or respiratory distress.
• aPTT levels: Normal at 32 seconds (reference: 30–40 seconds), which suggests no immediate risk of abnormal clotting or excessive anticoagulation. This finding does not directly indicate myocardial infarction but is important in monitoring bleeding risk with thrombolytic therapy. A significantly elevated aPTT could raise concern for hemorrhagic complications.
• Elevated troponin levels: A highly specific marker for myocardial injury. The rise in Troponin T and Troponin I over time confirms myocardial damage, distinguishing acute coronary syndrome from stable angina. This trend is critical in diagnosing myocardial infarction, as troponin elevation correlates with the extent of cardiac muscle injury.

A. Hypoactive bowel sounds: Hyperkalemia typically causes increased gastrointestinal motility, leading to hyperactive bowel sounds and diarrhea rather than hypoactive bowel sounds.

B. Sinus rhythm with peaked T waves: Elevated potassium levels affect cardiac conduction, leading to ECG changes such as peaked T waves, prolonged PR intervals, and widened QRS complexes. These findings indicate early hyperkalemia and require immediate attention.

C. Irritability and anxiety: While hyperkalemia can cause neuromuscular symptoms, such as muscle weakness and paresthesia, irritability and anxiety are more commonly associated with hypoglycemia or hypoxia rather than hyperkalemia.

D. Shallow respirations: Severe hyperkalemia can lead to muscle weakness, including respiratory muscles, but this occurs in later stages. Shallow respirations are more commonly associated with conditions like respiratory depression or metabolic alkalosis.