NRNP 6557 Week 6 Complex Case Analysis Example

Complex Case Analysis: Chest Pressure at Hour 62, and How One Complication Re-Ranked an Ulcer and a Stent

Student Name

College of Nursing, Walden University

NRNP 6557: Adult Acute Care: Comprehensive Patient Management II

Instructor Name

Month Day, Year

Complex Case Analysis: Chest Pressure at Hour 62, and How One Complication Re-Ranked an Ulcer and a Stent

The Case as It Stood

Composite case, the same patient followed since week 1. At hour 48 after endoscopic therapy, the 67-year-old man with duodenal ulcer bleeding and a five-week-old coronary stent was on the medical floor. The ranked list at that point, written without knowledge of what followed: (1) ulcer bleeding after endoscopic therapy, in the 72-hour window of highest rebleeding risk; (2) recent stent, aspirin continued, ticagrelor held with a restart planned at hour 72; (3) anemia, hemoglobin 8.1 g/dL after 2 units, transfusion threshold 8 g/dL; (4) kidney injury improving, creatinine 1.6 mg/dL; (5) diabetes with insulin being recalculated; (6) naproxen stopped; (7) hypertension, metoprolol at half dose, lisinopril held.

That ordering followed the evidence available. Most recurrent bleeding after endoscopic treatment of high-risk ulcers happens in the first three days (Lau et al., 2000). Aspirin was kept because stopping it after ulcer bleeding was associated with higher mortality in a randomized trial (Sung et al., 2010) and because guidance advises against holding aspirin taken for secondary prevention (Abraham et al., 2022). He had no chest pain, an unchanged ECG, and a flat troponin. There was no finding at hour 48 that placed the stent above the ulcer.

The Complication

At hour 62, at 2 a.m., he called his nurse for chest pressure while walking back from the bathroom, "like the heart attack but not as bad." Heart rate 108, blood pressure 104/62, oxygen saturation 95% on room air. ECG: new horizontal ST-segment depression of 1.5 mm in V4 to V6, no ST elevation. Troponin, flat for two days, rose from 0.04 to 0.21 ng/mL on a sample 3 hours later, and to 0.46 ng/mL at 6 hours. Hemoglobin 7.6 g/dL, with no melena overnight and a stable bowel movement check.

The findings became convincing, rather than merely present, with the ECG. Chest discomfort alone could have been reflux, anxiety, or a hospital night. New ST depression in the territory of his recent stent, followed by a troponin rise above the reference limit, meets the definition of acute myocardial infarction. The pattern, ischemia during exertion with anemia and tachycardia, ST depression rather than elevation, and no evidence of an occluded artery, fits a type 2 infarction, in which the problem is a mismatch between oxygen supply and demand rather than a new thrombus (Thygesen et al., 2018). Stent thrombosis, the feared alternative, typically presents with ST elevation; it was considered and not supported by the ECG, but the cardiology team was called immediately because the distinction could not be made with certainty at the bedside.

The Revised Ranking

1. Type 2 myocardial infarction from anemia and tachycardia, with stent thrombosis not excluded. Moved up from its place within entry 2: ischemia is now happening, not a risk being managed. The action it drives is immediate: transfuse, control rate, and involve cardiology.

2. Anemia. Moved up from third: it is no longer a background strain but the most likely cause of entry 1. The transfusion threshold changes from 8 to 10 g/dL, because the flip condition set in advance, active ischemia, has occurred. In patients with myocardial infarction and anemia, the liberal strategy of transfusing below 10 g/dL had lower rates of death or reinfarction than a restrictive strategy, though the difference was not statistically significant (Carson et al., 2023).

3. Ulcer bleeding after endoscopic therapy. Moved down from first: at hour 62 he is near the end of the highest-risk window, with no clinical rebleeding. It is still active, and more blood raises venous pressure at a healing ulcer, but it no longer outranks an infarction in progress.

4. Recent stent and P2Y12 inhibitor. The ticagrelor restart, planned for hour 72, is moved forward on cardiology's advice to the morning of hour 66, since an ischemic event in a recently stented patient argues against extending the pause.

Entries that did not move: kidney injury held at its position because nothing about it changed, though transfusion volume is watched against his heart. Diabetes held, but the insulin dose is reviewed because stress hyperglycemia is expected. Naproxen and hypertension held; metoprolol, already at half dose, is kept rather than increased, because his pressure cannot absorb more beta-blockade while he is anemic.

Why the First Ordering Was Reasonable

The earlier ranking was not a mistake. At hour 48, the evidence placed the greatest threat in the ulcer: the rebleeding window was open, the stent had aspirin protection, and the heart showed no sign of stress. A plan that had placed the stent first and resumed ticagrelor on day 1 would have increased the risk of the more likely complication, rebleeding, to reduce the risk of a less likely one. The anemia threshold of 8 g/dL, above the 7 g/dL that improved survival in a trial of upper gastrointestinal bleeding which excluded patients with acute coronary syndromes (Villanueva et al., 2013), already reflected his cardiac history. What the ordering could not do was prevent a supply and demand mismatch in a heart that had been injured five weeks earlier and was now running at 104 beats per minute on a hemoglobin in the 7s.

The Earlier Signal

Looking back, one signal was present before the hinge. Between hours 46 and 60, his resting heart rate drifted from 88 to 104, and his hemoglobin fell from 8.1 to 7.7 g/dL without melena. His wife told the evening nurse he was "breathing harder" on the walk to the bathroom. Each finding had a plausible benign reading, and none crossed a threshold that the plan had named. The lesson for the monitoring plan is specific: a rising resting heart rate in an anemic patient with recent infarction should itself be a trigger for a hemoglobin check and an ECG, even without chest pain or visible bleeding.

References

Abraham, N. S., Barkun, A. N., Sauer, B. G., Douketis, J., Laine, L., Noseworthy, P. A., Telford, J. J., & Leontiadis, G. I. (2022). American College of Gastroenterology-Canadian Association of Gastroenterology clinical practice guideline: Management of anticoagulants and antiplatelets during acute gastrointestinal bleeding and the periendoscopic period. The American Journal of Gastroenterology, 117(4), 542-558. https://doi.org/10.14309/ajg.0000000000001627

Carson, J. L., Brooks, M. M., Hébert, P. C., Goodman, S. G., Bertolet, M., Glynn, S. A., Chaitman, B. R., Simon, T., Lopes, R. D., Goldsweig, A. M., DeFilippis, A. P., Abbott, J. D., Potter, B. J., Carrier, F. M., Rao, S. V., Cooper, H. A., Ghafghazi, S., Fergusson, D. A., Kostis, W. J., . . . Alexander, J. H. (2023). Restrictive or liberal transfusion strategy in myocardial infarction and anemia. The New England Journal of Medicine, 389(26), 2446-2456. https://doi.org/10.1056/NEJMoa2307983

Lau, J. Y., Sung, J. J., Lee, K. K., Yung, M. Y., Wong, S. K., Wu, J. C., Chan, F. K., Ng, E. K., You, J. H., Lee, C. W., Chan, A. C., & Chung, S. C. (2000). Effect of intravenous omeprazole on recurrent bleeding after endoscopic treatment of bleeding peptic ulcers. The New England Journal of Medicine, 343(5), 310-316. https://doi.org/10.1056/NEJM200008033430501

Sung, J. J., Lau, J. Y., Ching, J. Y., Wu, J. C., Lee, Y. T., Chiu, P. W., Leung, V. K., Wong, V. W., & Chan, F. K. (2010). Continuation of low-dose aspirin therapy in peptic ulcer bleeding: A randomized trial. Annals of Internal Medicine, 152(1), 1-9. https://doi.org/10.7326/0003-4819-152-1-201001050-00179

Thygesen, K., Alpert, J. S., Jaffe, A. S., Chaitman, B. R., Bax, J. J., Morrow, D. A., White, H. D., & Executive Group on behalf of the Joint European Society of Cardiology/American College of Cardiology/American Heart Association/World Heart Federation Task Force for the Universal Definition of Myocardial Infarction. (2018). Fourth universal definition of myocardial infarction (2018). Circulation, 138(20), e618-e651. https://doi.org/10.1161/CIR.0000000000000617

Villanueva, C., Colomo, A., Bosch, A., Concepción, M., Hernandez-Gea, V., Aracil, C., Graupera, I., Poca, M., Alvarez-Urturi, C., Gordillo, J., Guarner-Argente, C., Santaló, M., Muñiz, E., & Guarner, C. (2013). Transfusion strategies for acute upper gastrointestinal bleeding. The New England Journal of Medicine, 368(1), 11-21. https://doi.org/10.1056/NEJMoa1211801