Post–Cardiac Arrest Syndrome with Dr. Alexis Topjian-Part 2
Jan 8, 2024
auto_awesome
Dr. Alexis Topjian discusses post-cardiac arrest care, including therapeutic hypothermia trials in pediatric patients and the impact of temperature management on outcomes. The podcast also highlights the importance of clinical pathways, neuro-prognostication, and building systems to improve patient care.
Cooling to 33 degrees Celsius in post-cardiac arrest care may not significantly improve outcomes compared to maintaining temperature at 36 degrees, but there is a higher percentage of favorable outcomes in the 33-degree group for pediatric patients.
Careful monitoring of physiological changes during cooling and rewarming phases is crucial, including considerations of heart rate, systemic vascular resistance, fluid management, insulin administration, and electrolyte assessments.
Deep dives
Cooling and Targeted Temperature Management in Pediatric Post-Cardiac Arrest Care
One of the main topics discussed in this episode is the use of cooling or targeted temperature management in post-cardiac arrest care. The speaker explains that cooling to 33 degrees Celsius was initially thought to improve outcomes based on adult cooling trials in the early 2000s. However, recent trials in adults have shown no significant difference in outcomes between patients treated with targeted temperature management at 33 degrees and those maintained at 36 degrees. On the pediatric side, the FAP trial revealed no difference between cooling to 33 degrees and maintaining normal temperature at 36.8 degrees for children after out-of-hospital cardiac arrest. However, the trial did show a higher percentage of favorable outcomes in the 33-degree group. As a result, some centers have adopted a personalized approach, allowing providers to choose between cooling to 33 or maintaining temperature at 36.8 based on their own interpretations of the data. It is important to note that cooling is just one component of post-arrest care, and a comprehensive bundle of care is provided to all patients, regardless of the temperature targeted.
Considerations and Strategies in Cooling and Rewarming
The podcast episode also delves into the various considerations and strategies involved in cooling and rewarming patients who have undergone targeted temperature management. During the induction phase of cooling, physiological changes such as a drop in heart rate, increased systemic vascular resistance, and cold diuresis are expected. The maintenance phase involves keeping the patient at a steady temperature, monitoring for any fluctuations, and being cautious of fever as a potential sign of new infection. The rewarming phase can be a delicate process, involving vasodilation, increased heart rate, and potential decreases in output and central venous pressure. Gradual rewarming over 16 to 24 hours is typically recommended to minimize hemodynamic instability. To manage the physiological changes during each phase, careful monitoring, fluid management, insulin administration, and electrolyte assessments are implemented. Rewarming also triggers the release of potassium from cells and improved insulin sensitivity, so these factors need to be considered when adjusting treatment.
Neuro-Prognostication and Communicating with Families
Neuro-prognostication is a critical aspect of post-cardiac arrest care, but it requires careful consideration and communication with families. The speaker emphasizes the importance of avoiding early neuro-prognostication, as it can be influenced by personal biases and inaccurate predictions. It is recommended to wait at least 72 hours before making decisions about patient outcomes. Factors such as EEG background, neurologic exams, pre-arrest factors, and long-term developmental milestones can provide valuable information, but the most reliable indicator of prognosis is typically the patient's condition after 5 days. Clinicians should be honest with families about their concerns and the treatments being provided, while also acknowledging the uncertainty and the potential for unexpected positive or negative changes. The speaker highlights the need for ongoing monitoring, with neurologists and neuroimaging playing important roles in refining prognostication strategies. Future directions in the field include the exploration of brain biomarkers, neuroimaging advancements, and personalized approaches based on individual patients' cerebral physiology.
Alexis Topjian, MD, MSCE is a Professor of Anesthesiology and Critical Care at the University of Pennsylvania. She is an intensivist at the Children’s Hospital of Philadelphia where she also serves as the Fellowship Director of Neurocritical Care, Director of the Pediatric Neurocritical Care Program, and the Director of Faculty Development. She also was the first author on the 2019 Pediatric Post–Cardiac Arrest Care Scientific Statement from the American Heart Association.
Learning Objectives:
By the end of this podcast, listeners should be able to describe:
The clinical characteristics of post-cardiac arrest syndrome.
The general goals and guiding principles of high quality post-cardiac arrest care.
An evidence-based approach to diagnostic testing and monitoring of the post-cardiac arrest patient.
An evidence-based approach to supportive treatment of the post-cardiac arrest patient with an emphasis on targeted temperature management.
Relevant prognostic factors and best practices communicating prognosis to families of children who have suffered a cardiac arrest.
References:
Topjian AA, de Caen A, Wainwright MS, Abella BS, Abend NS, Atkins DL, Bembea MM, Fink EL, Guerguerian AM, Haskell SE, Kilgannon JH, Lasa JJ, Hazinski MF. Pediatric Post-Cardiac Arrest Care: A Scientific Statement From the American Heart Association. Circulation. 2019 Aug 6;140(6):e194-e233. doi: 10.1161/CIR.0000000000000697. Epub 2019 Jun 27. PMID: 31242751.
Moler et al. Therapeutic hypothermia after out-of-hospital cardiac arrest in children. N Engl J Med. 2015 May 14;372(20):1898-908. doi: 10.1056/NEJMoa1411480. Epub 2015 Apr 25. PMID: 25913022; PMCID: PMC4470472.
Moler et al; THAPCA Trial Investigators. Therapeutic Hypothermia after In-Hospital Cardiac Arrest in Children. N Engl J Med. 2017 Jan 26;376(4):318-329. doi: 10.1056/NEJMoa1610493. Epub 2017 Jan 24. PMID: 28118559; PMCID: PMC5310766.
How to support PedsCrit: Please complete our Listener Feedback Survey Please rate and review on Spotify and Apple Podcasts! Donations are appreciated @PedsCrit on Venmo , you can also support us by becoming a patron on Patreon. 100% of funds go to supporting the show.
Thank you for listening to this episode of PedsCrit. Please remember that all content during this episode is intended for educational and entertainment purposes only. It should not be used as medical advice. The views expressed during this episode by hosts and our guests are their own and do not reflect the official position of their institutions. If you have any comments, suggestions, or feedback-you can email us at pedscritpodcast@gmail.com. Check out http://www.pedscrit.comfor detailed show notes. And visit @critpeds on twitter and @pedscrit on instagram for real time show updates.
Get the Snipd podcast app
Unlock the knowledge in podcasts with the podcast player of the future.
AI-powered podcast player
Listen to all your favourite podcasts with AI-powered features
Discover highlights
Listen to the best highlights from the podcasts you love and dive into the full episode
Save any moment
Hear something you like? Tap your headphones to save it with AI-generated key takeaways
Share & Export
Send highlights to Twitter, WhatsApp or export them to Notion, Readwise & more
AI-powered podcast player
Listen to all your favourite podcasts with AI-powered features
Discover highlights
Listen to the best highlights from the podcasts you love and dive into the full episode