Pseudoaneurysm of the ascending aorta: case report of a donor-derived Pseudomonas infection in a heart transplant recipient

Background

Mycotic aortic pseudoaneurysm is a rare complication after heart transplantation (HTX) with remarkable mortality. Intrathoracic infection is a well-documented predisposing factor for this disease. Staphylococcus aureus, Pseudomonas aeruginosa or Candida species are commonly isolated from resected specimens of the pseudoaneurysms. We demonstrate a unique case of mycotic pseudoaneurysm caused by presumably donor-derived Pseudomonas infection in a heart transplant recipient.

Case presentation

Our 67-year-old male patient treated with diabetes mellitus underwent HTX. The donor suffered from epiglottic abscess and pneumonia with known microorganisms including Pseudomonas, therefore both the donor and recipient received targeted antimicrobial therapy and prophylaxis. Five months after the uneventful HTX, lab test of the asymptomatic patient showed moderate, increasing C-reactive protein level without obviuos source of infection. Chest computed tomography showed a large (90 mm) saccular dilatation of the tubular portion of ascending aorta. Urgent surgical intervention identified a pseudoaneurysm, histological examinations and cultures of the resected aorta verified Pseudomonas aeruginosa aortitis, while all blood cultures remained negative. Retrospective interrogation of other transplanted organs of the donor supported donor-derived infection as the transport fluid of the right kidney grew Pseudomonas. The patient received 3 weeks of ceftazidime followed by 7 months of oral ciprofloxacin therapy. One year after the operation the patient was asymptomatic with normal inflammatory markers.

Conclusions

Donor-derived infection is a rare but potential cause of aortitis. Early diagnosis, surgical intervention and adjuvant antibiotic therapy seem to be the keys to successful management of mycotic pseudoaneurysms after HTX.

An Interaction Effect Analysis of Thermodilution-Guided Hemodynamic Optimization, Patient Condition, and Mortality after Successful Cardiopulmonary Resuscitation

Proper hemodynamic management is necessary among post-cardiac arrest patients to improve survival. We aimed to investigate the effects of PiCCO™-guided (pulse index contour cardiac output) hemodynamic management on mortality in post-resuscitation therapy. In this longitudinal analysis of 63 comatose patients after successful cardiopulmonary resuscitation cooled to 32–34 °C, 33 patients received PiCCO™, and 30 were not monitored with PiCCO™. Primary and secondary outcomes were 30 day and 1 year mortality. Kaplan–Meier curves and log-rank tests were used to assess differences in mortality among the groups. Interaction effects to disentangle the relationship between patient’s condition, PiCCO™ application, and mortality were assessed by means of Chi-square tests and logistic regression models. A 30 day mortality was significantly higher among PiCCO™ patients, while 1 year mortality was marginally higher. More severe patient condition per se was not the cause of higher mortality rate in the PiCCO™ group. Patients in better health conditions (without ST-elevation myocardial infarction, without cardiogenic shock, without intra-aortic balloon pump device, or without stroke in prior history) had worse outcomes with PiCCO™-guided therapy. Catecholamine administration worsened both 30 day and 1 year mortality among all patients. Our analysis showed that there was a complex interaction relationship between PiCCO™-guided therapy, patients’ condition, and 30 day mortality for most conditions.

Pilot analysis of the usefulness of mortality risk score systems at resuscitated patients

Összefoglaló. Bevezetés: A cardiovascularis halálokok közül világszerte nagy jelentőségű a hirtelen szívhalál. Annak ellenére, hogy a cardiopulmonalis resuscitatio és a postresuscitatiós intenzív osztályos kezelés is komoly metodikai és technikai fejlődésen ment keresztül az elmúlt időszakban, kevés az olyan validált pontrendszer, amely jól becsülné a beteg intenzív osztályra kerülésekor a mortalitási rizikót. Célkitűzés: A sikeres újraélesztést követő intenzív osztályos kezelés kezdetekor felmért, a cardiogen shock rizikóstratifikációjára alkalmazott CardShock Risk Score (CSRS) és az általunk hozzáadott, specifikus súlyozófaktorokkal (iniciális ritmus, inotropigény) módosított CardShock Risk Score (mCSRS) összevetése a mortalitás előrejelzésében post-cardiac arrest szindrómás betegeknél. Módszerek: Retrospektív vizsgálatunk során 172, kórházon kívül sikeresen újraélesztett és klinikánkon ellátott consecutiv betegből a CSRS- és mCSRS-pontrendszerek segítségével végül 123 beteg adatait elemeztük. A CSRS- és mCSRS-változók és a korai/késői mortalitás közötti összefüggést Cox-regressziós analízissel vizsgáltuk. A pontszámok alapján 3 csoportba (1-3, 4-6, 7+) soroltuk a betegeket. Az összevont csoportok túlélését log-rank teszttel hasonlítottuk össze. Eredmények: A betegpopuláció átlagéletkora 63,6 év volt (69% férfi), és a hirtelen szívhalál hátterében 80%-ban akut coronaria szindróma állt. A korai/késői mortalitást leginkább a felvétel utáni neurológiai állapot, a szérumlaktátszint, a vesefunkció, az iniciális ritmus és a beteg katecholaminigénye határozta meg. A mCSRS alkalmazását követően mind az "1-3" és a "4-6" (p≤0,001), mind a "4-6" és a "7+" (p = 0,006) csoportok között szignifikáns különbséget találtunk a túlélésben. Következtetés: A felvételkori pontok alapján a mCSRS pontosabban definiálja és differenciálja egymástól az általunk beválasztott két extra súlyozófaktorral az enyhe, a közepes és a magas mortalitási rizikóval bíró betegpopulációkat, mint a CSRS. Orv Hetil. 2021; 162(2): 52-60.

SUMMARY

INTRODUCTION

Sudden cardiac death is one of the most significant cardiovascular causes of death worldwide. Although there have been immense methodological and technical advances in the field of cardiopulmonary resuscitation and following intensive care in the last decade, currently there are only a few validated risk-stratification scoring systems for the quick and reliable estimation of the mortality risk of these patients at the time of admission to the intensive care unit.

OBJECTIVE

Our aim was to correlate the mortality prediction risk points calculated by CardShock Risk Score (CSRS) and modified (m) CSRS based on the admission data of the post-cardiac arrest syndrome (PCAS) patients.

METHODS

The medical records of 172 out-of-hospital resuscitated cardiac arrest patients, who were admitted at the Heart and Vascular Centre of Semmelweis University, were screened retrospectively. Out of the 172 selected patients, 123 were eligible for inclusion to calculate CSRS and mCSRS. Based on CSRS score, we generated three different groups of patients, with scores 1 to 3, 4 to 6, and 7+, respectively. Mortality data of the groups were compared by log-rank test.

RESULTS

Mean age of the patients was 63.6 years (69% male), the cause of sudden cardiac death was acut coronary syndrome in 80% of the cases. The early and late mortality was predicted by neurological status, serum lactate level, renal function, initial rhythm, and the need of catecholamines. Using mCSRS, a significant survival difference was proven in between the groups "1-3" vs "4-6" (p≤0.001), "4-6" vs "7+" (p = 0.006).

CONCLUSION

Compared to the CSRS, the mCSRS expanded with the 2 additional weighting points differentiates more specifically the low-moderate and high survival groups in the PCAS patient population treated in our institute. Orv Hetil. 2021; 162(2): 52-60.

The role of age in post-cardiac arrest therapy in an elderly patient population

Aim

We investigated the effect of age on post-cardiac arrest treatment outcomes in an elderly population, based on a local database and a systemic review of the literature.

Methods

Data were collected retrospectively from medical charts and reports. Sixty-one comatose patients, cooled to 32-34 °C for 24 h, were categorized into three groups: younger group (≤65 years), older group (66-75 years), and very old group (>75 years). Circumstances of cardiopulmonary resuscitation (CPR), patients' characteristics, post-resuscitation treatment, hemodynamic monitoring, neurologic outcome and survival were compared across age groups. Kruskal-Wallis test, Chi-square test and binary logistic regression (BLR) were applied. In addition, a literature search of PubMed/Medline database was performed to provide a background.

Results

Age was significantly associated with having a cardiac arrest on a monitor and a history of hypertension. No association was found between age and survival or neurologic outcome. Age did not affect hemodynamic parameter changes during target temperature management (TTM), except mean arterial pressure (MAP). Need of catecholamine administration was the highest among very old patients. During the literature review, seven papers were identified. Most studies had a retrospective design and investigated interventions and outcome, but lacked unified age categorization. All studies reported worse survival in the elderly, although old survivors showed a favorable neurologic outcome in most of the cases.

Conclusion

There is no evidence to support the limitation of post-cardiac arrest therapy in the aging population. Furthermore, additional prospective studies are needed to investigate the characteristics and outcome of post-cardiac arrest therapy in this patient group.