Resuscitation after cardiac surgery: are we ageist?:

Prevalence and related factors of do-not-resuscitate orders among in-hospital cardiac arrest patients

PURPOSE

Studies concerning do-not-resuscitate (DNR) orders in mainland China are rather scarce. We explored the prevalence and related factors of DNR orders among in-hospital cardiac arrest (IHCA) patients at a general tertiary hospital in mainland China.

MATERIALS AND METHODS

We identified all IHCA patients hospital-wide between July 2019 and September 2020. Data regarding DNR status were collected from medical records. We investigated the frequency of DNR orders and explored the determinant factors of DNR establishment using logistic regression.

RESULTS

A total of 1154 IHCA patients were included, 535 (46.4%) of whom established DNR orders. The following variables were independently associated with a higher DNR rate: female (OR 1.491; 95% CI 1.130-1.965), older age (OR 1.016; 95% CI 1.008-1.024), being a local resident (OR 1.790; 95% CI 1.344-2.383), pulmonary infection (OR 1.398; 95% CI 1052-1.859), respiratory insufficiency (OR 1.356; 95% CI 1.009-1.823), shock (OR 1.735; 95% CI 1.301-2.313), acute stroke (OR 1.821; 95% CI 1.235-2.686),neurological dysfunction (OR 1.527; 95% CI 1.149-2.028) and cancer (OR 3.316; 95% CI 2.461-4.468). Counterintuitively, patients with new-onset coronary artery disease (OR 0.592; 95% CI 0.419-0.837) were less likely to create DNR orders.

CONCLUSION

In mainland China, the DNR order signing rate is low, and the establishment of a DNR order is associated with demographics and comorbidity characteristics.

Cardiac Arrest After Cardiac Surgery: An Evidence-Based Resuscitation Protocol

More than 250 000 cardiac surgical procedures are performed annually in the United States. Postoperative cardiac arrest rates range from 0.7% to 5.2%. This article reviews current evidence for cardiac arrest resuscitation after cardiac surgery. The evaluation included resuscitation guidelines and 22 studies identified through a MEDLINE search. Evidence-based resuscitation differs from advanced cardiovascular life support guidelines. European Resuscitation Council guidelines include correcting reversible causes of arrest, applying defibrillation/pacing before external cardiopulmonary resuscitation, resternotomy within 5 minutes if electrical therapies fail, and restricting epinephrine use to avoid rebound hypertension. A 2017 Society of Thoracic Surgeons protocol derived from European Resuscitation Council guidelines is now standard of care in the United States. Evidence-based practices can improve survival and reduce resternotomy rates. This article describes the clinical implementation of the Society of Thoracic Surgeons guidelines.

End of Life Care and Do Not Resuscitate Orders: How Much Does Age Influence Decision Making? A Systematic Review and Meta-Analysis

With population aging, “do not resuscitate” (DNAR) decisions, pertaining to the appropriateness of attempting resuscitation following a cardiac arrest, are becoming commoner. It is unclear from the literature whether using age to make these decisions represents “ageism.” We undertook a systematic review of the literature using CINAHL, Medline, and the Cochrane database to investigate the relationship between age and DNAR. All 10 studies fulfilling our inclusion criteria found that “do not attempt resuscitation” orders were more prevalent in older patients; eight demonstrated that this was independent of other mediating factors such as illness severity and likely outcome. In studies comparing age groups, the adjusted odds of having a DNAR order were greater in patients aged 75 to 84 and ≥85 years (adjusted odds ratio [AOR] 1.70, 95% confidence interval [CI] = [1.25, 2.33] and 2.96, 95% CI = [2.34, 3.74], respectively), compared with those <65 years. In studies treating age as a continuous variable, there was no significant increase in the use of DNAR with age (AOR 0.98, 95% CI = [0.84, 1.15]). In conclusion, age increases the use of “do not resuscitate” orders, but more research is needed to determine whether this represents “ageism.”

ALOX5AP gene variants show differential association with coronary artery disease in different populations

Coronary artery disease (CAD) is a complex disease with various components, genetic as well as environmental. Previous reports correlating ALOX5AP gene variants and CAD showed conflicting results depending on the population studied. In this study, we examined the contribution of ALOX5AP genetic predisposition to CAD in a group of CAD patients and controls carefully selected from the Lebanese population. We genotyped SNPs for ALOX5AP variants in 289 catheterized patients aged ≤52 years with >50% stenosis in at least one main coronary artery and 227 catheterized control subjects aged 60 years and above with 0% stenosis. Chi-square (χ (2)) tests and logistic regression showed no significant difference in the allele and genotype frequencies between the CAD or myocardial infarction (MI) cases and the healthy controls. Haplotype analysis using PHASE showed that the distribution of the risk haplotypes among cases and controls were not significantly different and had no attributable risk to CAD (P = 1.00 and P = 0.5, respectively) or MI (P = 0.2 and P = 0.5, respectively). Our data revealed that ALOX5AP gene variants are not predictors of CAD risk or MI risk among Lebanese patients.

Outcome of cardiopulmonary resuscitation in intensive care units in a university hospital

The purpose of this study is to evaluate the demographic characteristics of patients who suffered cardiac arrest in our intensive care units (ICUs) as well as to identify those factors influencing outcome after resuscitation following cardiac arrest.

METHODS

We reviewed the records of all patients who underwent cardiopulmonary resuscitation (CPR) in our ICUs at the Georg-August University Hospital, Goettingen, Germany, from January 1, 1999 to December 31, 2003.

RESULTS

One hundred and sixty-nine patients underwent CPR. Severity of illness assessed by SAPS II score on admission was 51.8+/-18.5 (predicted mortality 46.6%). The initially monitored rhythm at the time of arrest was asystole in 51 (30.2%) patients. Ventricular tachycardia/fibrillation (VT/VF) was recorded in 65 (38.5%) and pulseless electrical activity in 49 (29.0%) patients. Twenty (23.8%), 28 (33.3%) and 33 (39.3%) patients with initially recorded asystole, VT/VF and pulseless electrical activity (PEA) rhythms, respectively, survived to ICU discharge. Eighty of the 169 patients survived to hospital discharge giving a survival rate of 47.3%. The highest ICU mortality was seen in patients admitted for neurosurgery (80%) followed by major vascular surgery (77.8%), non-surgical patients (67.4%) and patients with severe sepsis (66.7%). The occurrence of cardiac arrest within the first 24h was associated with a significantly lower ICU mortality compared to a later incident. At hospital discharge 66 patients (82.5% of the survivors) achieved good cerebral recovery, 12 patients (15.0%) were severely disabled (CPC 3) while 2 (2.5%) remained unconscious.

CONCLUSION

Several factors affect the outcome from CPR. However, quicker triage to ICU, closer monitoring along with prompt intervention might minimise the consequences of cardiac arrest and its complications.