How are you taking part in this consultation?

You will not be able to change how you comment later.

You must be signed in to answer questions

    The content on this page is not current guidance and is only for the purposes of the consultation process.

    Appendix B: Other relevant studies

    Other potentially relevant studies that were not included in the main evidence summary (tables 2 and 3) are listed in table 5 below.

    Case studies and observational studies with fewer than 100 people were excluded unless they included outcomes that were not frequently reported.

    Table 5 additional studies identified

    Study

    Number of people and follow up

    Direction of conclusions

    Reason study was not included in main evidence summary

    Carroll BJ, Shah RV, Murthy V et al. (2015) Clinical features and outcomes in adults with cardiogenic shock supported by extracorporeal membrane oxygenation. The American Journal of Cardiology 116(10): 1624-30

    Single centre retrospective study, US

    n=123 (26 postcardiotomy [21%])

    Follow-up: In-hospital

    Overall, 69 people (56%) were weaned from ECMO, with 48 patients (39%) surviving to discharge. People with postcardiotomy shock had the poorest overall survival after ECMO.

    Included in Kowalewski (2020) SLR.

    Distelmaier K, Wiedemann D, Binder C et al. (2018) Duration of extracorporeal membrane oxygenation support and survival in cardiovascular surgery patients. Journal of Thoracic and Cardiovascular Surgery 155(6): 2471-2476

    Single centre retrospective study, Austria

    n=354

    Follow-up: median 45 months (IQR: 20 to 81 months)

    Through a median follow-up period of 45 months, 245 people (69%) died. An association between increased duration of ECMO support and mortality was observed in people who survived ECMO support with a crude hazard ratio of 1.96 (95% CI 1.40 to 2.74; p<0.001) for 2 year mortality compared with the third tertile and the second tertile of ECMO duration.

    Included in Kowalewski (2020) SLR.

    Djordjevic I, Eghbalzadeh K, Sabashnikov A et al. (2020) Central vs peripheral venoarterial ECMO in postcardiotomy cardiogenic shock. Journal of Cardiac Surgery 35(5): 1037-1042

    Single centre retrospective study, Germany

    n=156

    Follow-up: 30 days

    30‐day mortality was comparable with nearly 70% in both cohorts (cECMO 39 [70%] vs pECMO 69 [69%]; p=0.93). ECMO complications occurred significantly more frequently in people treated with cECMO (cECMO 44 [79%] vs pECMO 54 [54%]; p<0.01).

    Outcomes not reported as overall population, but by subgroup: central or peripheral VA ECMO.

    Flecher E, Anselmi A, Corbineau H et al. (2014) Current aspects of extracorporeal membrane oxygenation in a tertiary referral centre: determinants of survival at follow-up. European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 46(4): 665-671

    Single centre retrospective study, France

    n=325 (postcardiotomy 29%)

    Follow-up: mean 84 days (SD: 86)

    Overall in the VA group, weaning rates were 59%, survival after 30 days was 44% and survival at the end of the follow-up was 41%.

    More recent studies with outcomes split by aetiologies were included.

    Fux T, Holm M, Corbascio M et al. (2018) Venoarterial extracorporeal membrane oxygenation for postcardiotomy shock: Risk factors for mortality. The Journal of Thoracic and Cardiovascular Surgery 156(5): 1894-1902e3

    Single centre retrospective study, Sweden

    n=105

    Follow-up: 90 days

    The 90-day overall mortality was 57%, and in-hospital mortality was 56%. Forty-seven percent of patients died on venoarterial extracorporeal membrane oxygenation, 51% of patients were successfully weaned, 1% of patients were bridged to heart transplantation, and 1%of patients were bridged to left ventricular assist device.

    Included in Alba (2021) SLR.

    Khorsandi M, Dougherty S, Bouamra O et al. (2017) Extra-corporeal membrane oxygenation for refractory cardiogenic shock after adult cardiac surgery: a systematic review and meta-analysis. Journal of cardiothoracic surgery 12(1): 55

    Systematic review and meta-analysis

    n=1,926

    24 studies

    Follow-up: In-hospital

    Meta-analysis for overall survival rate to hospital discharge of 31% (95% CI 0.29 to 0.34, p<0.01, I2=60%).

    More recent systematic reviews and meta-analyses included.

    Kowalewski M, Raffa G, Zielinski K et al. (2020) Baseline surgical status and short-term mortality after extracorporeal membrane oxygenation for post-cardiotomy shock: a meta-analysis. Perfusion 35(3): 246-254

    Systematic review and meta-analysis

    n=2,235

    22 studies

    Follow-up: In-hospital, 30 day

    Overall in-hospital or 30-day mortality event rate was 67% (95% CI 63 to 70%). There were no differences in in-hospital or 30-day mortality with respect to baseline surgical status in the subgroup analysis (test for subgroup differences; p=0.406).

    Studies with more relevant outcomes were included.

    Mariani S, van Bussel BCT, Ravaux JM et al. (2023) Variables associated with in-hospital and postdischarge outcomes after postcardiotomy extracorporeal membrane oxygenation: Netherlands Heart Registration Cohort. Journal of Thoracic and Cardiovascular Surgery 165(3): 1127-1137e14

    Retrospective Netherlands Heart Registry study

    n=406

    Follow-up: In-hospital, 1 year

    In-hospital mortality was 52%, with death occurring in a median of 5 days (IQR 2 to 14 days) after surgery. Hospital survivors (n=196) experienced considerable rates of pulmonary infections, respiratory failure, arrhythmias, and deep sternal wound infections during a hospitalisation of median 29 days (IQR 17 to 51 days).

    Larger registry studies from broader regions included.

    Melehy A, Ning Y, Kurlansky P et al. (2022) Bleeding and thrombotic events during extracorporeal membrane oxygenation for postcardiotomy shock. The Annals of Thoracic Surgery 113(1): 131-137

    Single centre retrospective study, USA

    n=141

    Follow-up: In-hospital

    Of the 152 patients who received ECMO for postcardiotomy shock, 33 (23%) had 40 thrombotic events and 64 (45%) had 86 bleeding events.

    Studies with more relevant outcomes were included.

    Mihu MR, El Banayosy AM, Harper MD et al. (2024) Comparing outcomes of post-cardiotomy cardiogenic shock patients: on-site cannulation vs. retrieval for V-A ECMO support. Journal of Clinical Medicine 13(11): 3265

    Single centre retrospective study, USA

    n=121

    Follow-up: In-hospital

    The overall mortality rate was 52%. Of the patients who died (n=63), 50 experienced on-ECMO mortalities, and 13 had post-weaning mortalities. The ECLS weaning rate was 55% (n=34) in the retrieved group and 63% (n=37) in the on-site group (p=0.38).

    Outcomes not reported as overall population, but by subgroup: cannulation on or off site.

    Papadopoulos N, Marinos S, El-Sayed Ahmad A et al. (2015) Risk factors associated with adverse outcome following extracorporeal life support: Analysis from 360 consecutive patients. Perfusion 30(4): 284-290

    Single centre retrospective study, Germany

    n=360

    Follow-up: In-hospital, 5 years

    ECLS weaning was successful in 58% and 30% could be discharged from hospital. The main cause of death was sepsis (69%). Overall, major cerebrovascular events occurred in 12% (bleeding 3%, embolic 9%), limb ischaemia in 13%, GI complications in 16% and RRT in 61%. Kaplan Meier estimates for long-term survival were 26% at one year and 22% at 5 years.

    Included in Kowalewski (2020), Biancari (2018), Alba (2021) SLRs.

    Provaznik Z, Philipp A, Zeman F et al. (2021) Extracorporeal life support in postcardiotomy cardiogenic shock: a view on scenario, outcome, and risk factors in 261 patients. The Thoracic and Cardiovascular Surgeon 69(3): 271-278

    Single centre retrospective study, Germany

    n=261

    Follow-up: median 3.2 years

    Overall mortality on ECLS was 39%. Overall follow-up survival was 24%.

    Larger studies with longer follow-up included.

    Sahli SD, Kaserer A, Braun J et al. (2022) Predictors associated with mortality of extracorporeal life support therapy for acute heart failure: single-center experience with 679 patients. Journal of Thoracic Disease 14(6): 1960-1971

    Single centre retrospective study, Switzerland

    n=679 (postcardiotomy n=215)

    Follow-up: In-hospital

    In-hospital mortality significantly varied between ECLS indications: 71% (152/215) for postcardiotomy, 68% (108/159) for cardiopulmonary resuscitation, 47% (110/234) for refractory cardiogenic shock, and 10% (7/71) for lung transplantation and expansive thoracic surgery (p<0.001).

    Larger studies split by cardiogenic shock aetiology were included.

    Shao C, Wang L, Yang F et al. (2022) Quality of life and mid-term survival in patients receiving extracorporeal membrane oxygenation after cardiac surgery. ASAIO Journal 68(3): 349-355

    Single centre retrospective study, China

    n=102

    Follow-up: 5 years

    The SF-36 scores in general health and vitality were significantly lower among the ECMO survivors (p<0.05). After discharge, ECMO versus non-ECMO survival (93% versus 82%; p=0.013).

    Studies with more relevant outcomes were included.

    Xie H, Yang F, Hou D et al. (2020) Risk factors of in-hospital mortality in adult postcardiotomy cardiogenic shock patients successfully weaned from venoarterial extracorporeal membrane oxygenation. Perfusion 35(5): 417-426

    Single centre retrospective study, China

    n=363

    Follow-up: In-hospital

    In total, 212 (58%) of 363 postcardiotomy cardiogenic shock patients were successfully weaned from venoarterial extracorporeal membrane oxygenation.

    Studies with more relevant outcomes and larger studies with longer follow-up were included.

    Zhigalov K, Sa MPBO, Safonov D et al. (2020) Clinical outcomes of venoarterial extracorporeal life support in 462 patients: Single-center experience. Artificial Organs 44(6): 620-627

    Single centre retrospective study, Germany

    n=462 (postcardiotomy n=357)

    Follow-up: In-hospital

    Overall, the in-hospital survival rate was 26%. There was no statistically significant difference between the groups: 26% for PCS and 25% for non-PCS, respectively. Weaning from VA-ECLS was possible in 44% for PCS and in 30% for non-PCS (p=0.004).

    Larger studies split by CS aetiology were included.