Effect of oxygen therapy on myocardial salvage in ST elevation myocardial infarction: the randomized SOCCER trial.

OBJECTIVE: Recent studies suggest that administration of O2 in patients with acute myocardial infarction may have negative effects. With the use of cardiac MRI (CMR), we evaluated the effects of supplemental O2 in patients with ST elevation myocardial infarction (STEMI) accepted for acute percutaneous coronary intervention (PCI). MATERIALS AND METHODS: This study was a randomized-controlled trial conducted at two university hospitals in Sweden. Normoxic STEMI patients were randomized in the ambulance to either supplemental O2 (10 l/min) or room air until the conclusion of the PCI. CMR was performed 2-6 days after the inclusion. The primary endpoint was the myocardial salvage index assessed by CMR. The secondary endpoints included infarct size and myocardium at risk. RESULTS: At inclusion, the O2 (n=46) and air (n=49) patient groups had similar patient characteristics. There were no significant differences in myocardial salvage index [53.9±25.1 vs. 49.3±24.0%; 95% confidence interval (CI): -5.4 to 14.6], myocardium at risk (31.9±10.0% of the left ventricle in the O2 group vs. 30.0±11.8% in the air group; 95% CI: -2.6 to 6.3), or infarct size (15.6±10.4% of the left ventricle vs. 16.0±11.0%; 95% CI: -4.7 to 4.1). CONCLUSION: In STEMI patients undergoing acute PCI, we found no effect of high-flow oxygen compared with room air on the size of ischemia before PCI, myocardial salvage, or the resulting infarct size. These results support the safety of withholding supplemental oxygen in normoxic STEMI patients.

A cardiac catheterisation laboratory core curriculum for the continuing professional development of nurses and allied health professions: developed by the Education working group of the Nurses and Allied Professions Committee for the European Association of Percutaneous Cardiovascular Interventions (EAPCI) 2016.

AIMS: The aim of this report is to provide a standard educational structure for nurses and allied professionals (NAP) specialising in interventional cardiology. The curriculum can also be used as a basis for training on a certificate-based level in interventional cardiology. METHODS AND RESULTS: The curriculum was developed by a panel of experts from various allied health professions. The syllabus focuses on nine core areas of themes essential for NAP working in interventional cardiology. The highly technical knowledge required for working in interventional cardiology as well as the various roles of the different professional groups have been taken into consideration. CONCLUSIONS: This core curriculum will ensure that essential content is covered during education and a basic level of quality is achieved across specialty cardiovascular educational programmes throughout Europe.

Physiologic effect of repeated adrenaline (epinephrine) doses during cardiopulmonary resuscitation in the cath lab setting: A randomised porcine study.

BACKGROUND: This porcine study was designed to explore the effects of repetitive intravenous adrenaline doses on physiologic parameters during CPR. METHODS: Thirty-six adult pigs were randomised to four injections of: adrenaline 0.02 mg(kgdose)(-1), adrenaline 0.03 mg(kgdose)(-1) or saline control. The effect on systolic, diastolic and mean arterial blood pressure, cerebral perfusion pressure (CePP), end tidal carbon dioxide (ETCO2), arterial oxygen saturation via pulse oximetry (SpO2), cerebral tissue oximetry (SctO2), were analysed immediately prior to each injection and at peak arterial systolic pressure and arterial blood gases were analysed at baseline and after 15 min. RESULT: In the group given 0.02 mg(kgdose)(-1), there were increases in all arterial blood pressures at all 4 pressure peaks but CePP only increased significantly after peak 1. A decrease in ETCO2 following peak 1 and 2 was observed. SctO2 and SpO2 were lowered following injection 2 and beyond. In the group given a 0.03 mg(kgdose)(-1), all ABP's increased at the first 4 pressure peaks but CePP only following 3 pressure peaks. Lower ETCO2, SctO2 and SpO2 were seen at peak 1 and beyond. In the two adrenaline groups, pH and Base Excess were lower and lactate levels higher compared to baseline as well as compared to the control. CONCLUSION: Repetitive intravenous adrenaline doses increased ABP's and to some extent also CePP, but significantly decreased organ and brain perfusion. The institutional protocol number: Malmö/Lund Committee for Animal Experiment Ethics, approval reference number: M 192-10.

Mechanical chest compressions in the coronary catheterization laboratory to facilitate coronary intervention and survival in patients requiring prolonged resuscitation efforts.

BACKGROUND: Resuscitation after cardiac arrest (CA) in the catheterization laboratory (cath-lab) using mechanical chest compressions (CC) during simultaneous percutaneous coronary intervention (PCI) is a strong recommendation in the 2015 European Resuscitation Council (ERC) guidelines. This study aimed at re-evaluating survival to hospital discharge and assess long term outcome in this patient population. METHODS: Patients presenting at the cath lab with spontaneous circulation, suffering CA and requiring prolonged mechanical CC during cath lab procedures between 2009 and 2013 were included. Circumstances leading to CA, resuscitation parameters and outcomes were evaluated within this cohort. For comparison, patients needing prolonged manual CC in the cath lab in the pre-mechanical CC era were evaluated. Six-month and one year survival with a mechanical CC treatment strategy from 2004 to 2013 was also evaluated. RESULTS: Thirty-two patients were included between 2009 and 2013 (24 ST-elevation myocardial infarction (STEMI), 4 non-STEMI, 2 planned PCI, 1 angiogram and 1 intra-aortic counter pulsation balloon pump insertion). Twenty were in cardiogenic shock prior to inclusion. Twenty-five were successfully treated with PCI. Median mechanical CC duration for the total cohort (n = 32) was 34 min (range 5-90), for the 15 patients with circulation discharged from the cath-lab, 15 min (range 5-90), and for the eight discharged alive from hospital, 10 min (range 5-52). Twenty-five percent survived with good neurological outcome at hospital discharge. Ten patients treated with manual CC were included with one survivor. DISCUSSION: Eighty-seven percent of the patients included in the mechanical CC cohort had their coronary or cardiac intervention performed during mechanical CC with an 80 % success rate. This shows that the use of mechanical CC during an intervention does not seem to impair the interventional result substantially. The survival rate after one year was 87 %. CONCLUSIONS: Among patients suffering CA treated with mechanical CC in the cath-lab, 25% had a good neurological outcome at hospital discharge compared to 10% treated with manual CC. Long term survival in patients discharged from hospital is good.

Safety, Feasibility, and Hemodynamic Effects of Mild Hypothermia in Transcatheter Aortic Valve Replacement: The TAVR-CHILL Trial.

The safety, feasibility, and hemodynamic effects of mild hypothermia (MH) induced by transnasal cooling were studied in transcatheter aortic valve replacement (TAVR). MH is a common therapy following cardiac arrest and seems to have favorable effects in myocardial infarction and on hemodynamic stability. In TAVR, hemodynamic instability is common during rapid pacing. Twenty subjects undergoing TAVR were randomized 1:1 to hypothermia or normothermia. Hemodynamic endpoints were mean arterial blood pressure and required dosage of vasoactive and inotropic drugs. Patients were followed up at 6 months. All patients in the MH group (n=10) reached the target temperature of 34°C before first rapid pacing. Tympanic and urinary bladder temperature remained significantly lower in the MH group during the procedure. No adverse effects of cooling were observed. Mean arterial pressure was higher in the MH group (90±20 mm Hg) than in the control group (71±13 mm Hg) at the start of the procedure, at first rapid pacing (94±19 vs. 80±16 mm Hg), and at balloon aortic valvuloplasty (90±17 vs. 73±14 mm Hg). Less norepinephrine was administered to the hypothermia group. Transnasal cooling during TAVR was safe and well tolerated. We observed a more stable hemodynamic profile in the MH group, indicated by higher blood pressure and lower levels of vasoactive drugs required. A larger study of patients with severe ventricular dysfunction is required to more comprehensively investigate the hemodynamic effects of transnasal cooling in TAVR.

The Effects of Oxygen Therapy on Myocardial Salvage in ST Elevation Myocardial Infarction Treated with Acute Percutaneous Coronary Intervention: The Supplemental Oxygen in Catheterized Coronary Emergency Reperfusion (SOCCER) Study.

OBJECTIVES: Despite a lack of scientific evidence, oxygen has long been a part of standard treatment for patients with acute myocardial infarction (AMI). However, several studies suggest that oxygen therapy may have negative cardiovascular effects. We here describe a randomized controlled trial, i.e. Supplemental Oxygen in Catheterized Coronary Emergency Reperfusion (SOCCER), aiming to evaluate the effect of oxygen therapy on myocardial salvage and infarct size in patients with ST elevation myocardial infarction (STEMI) treated with a primary percutaneous coronary intervention (PCI). METHODS: One hundred normoxic STEMI patients accepted for a primary PCI are randomized in the ambulance to either standard oxygen therapy or no supplemental oxygen. All patients undergo cardiovascular magnetic resonance imaging (CMR) 2-6 days after the primary PCI, and a subgroup of 50 patients undergo an extended echocardiography during admission and at 6 months. All patients are followed for 6 months for hospital admission for heart failure and subjective perception of health. The primary endpoint is the myocardial salvage index on CMR. DISCUSSION: Even though oxygen therapy is a part of standard care, oxygen may not be beneficial for patients with AMI and is possibly even harmful. The results of the present and concurrent oxygen trials may change international treatment guidelines for patients with AMI or ischemia.

Repeated epinephrine doses during prolonged cardiopulmonary resuscitation have limited effects on myocardial blood flow: a randomized porcine study.

BACKGROUND: In current guidelines, prolonged cardiopulmonary resuscitation (CPR) mandates administration of repeated intravenous epinephrine (EPI) doses. This porcine study simulating a prolonged CPR-situation in the coronary catheterisation laboratory, explores the effect of EPI-administrations on coronary perfusion pressure (CPP), continuous coronary artery flow average peak velocity (APV) and amplitude spectrum area (AMSA). METHODS: Thirty-six pigs were randomized 1:1:1 to EPI 0.02 mg/kg/dose, EPI 0.03 mg/kg/dose or saline (control) in an experimental cardiac arrest (CA) model. During 15 minutes of mechanical chest compressions, four EPI/saline-injections were administered, and the effect on CPP, APV and AMSA were recorded. Comparisons were performed between the control and the two EPI-groups and a combination of the two EPI-groups, EPI-all. RESULT: Compared to the control group, maximum peak of CPP (Pmax) after injection 1 and 2 was significantly increased in the EPI-all group (p = 0.022, p = 0.016), in EPI 0.02-group after injection 2 and 3 (p = 0.023, p = 0.027) and in EPI 0.03-group after injection 1 (p = 0.013). At Pmax, APV increased only after first injection in both the EPI-all and the EPI 0.03-group compared with the control group (p = 0.011, p = 0.018). There was no statistical difference of AMSA at any Pmax. Seven out of 12 animals (58%) in each EPI-group versus 10 out of 12 (83%) achieved spontaneous circulation after CA. CONCLUSION: In an experimental CA-CPR pig model repeated doses of intravenous EPI results in a significant increase in APV only after the first injection despite increments in CPP also during the following 2 injections indicating inappropriate changes in coronary vascular resistance during subsequent EPI administration.

A review of the role of nurses and technicians in ST-elevation myocardial infarction (STEMI).

The role of nurses and technicians in the treatment of ST-elevation myocardial infarction (STEMI) by primary percutaneous coronary intervention (PPCI) is vital for the success of the multidisciplinary Heart Team. Several editorials have emphasised the importance of a holistic treatment which links each step of care to the next, a chain that is essential for quality and efficacy in the management of STEMI patients. In pre-hospital acute coronary care, the first medical contact is most commonly a nurse and/or a paramedic. The time from symptom onset to reperfusion is crucial for the long-term outcome. On arrival at the hospital, it is important for the nurse or paramedic to share an overview of what has been done to the patient so far, in a structured and evidence-based way, with the receiving nurse and physician. During PPCI, the role of nurses and technicians includes puncture site assessment, administration of pharmaceuticals and the ability to anticipate and prevent complications. In patients with cardiogenic shock and cardiac arrest, advanced knowledge of haemodynamic support systems is required. In the future, this knowledge must be extended from a limited number of individuals in a small number of centres to a standard of care which is available for all citizens throughout Europe. This review demonstrates the necessity for a multidisciplinary team approach where every person plays an equal, important role in every element of PPCI. The future role of nurses and technicians is intriguing and demands education and experience from an advanced medical and nursing point of view, where the multidisciplinary Heart Team and the knowledge of the different key players are vital.

The analgesic effect of oxygen during percutaneous coronary intervention (the OXYPAIN Trial).

INTRODUCTION: Oxygen is considered to have analgesic effects, but the evidence is weak. Oxygen may be harmful to the ischemic myocardium. The aim was to investigate the analgesic effect of oxygen during percutaneous coronary intervention (PCI) and to evaluate cardiac injury. MATERIAL AND METHODS: The OXYPAIN was a phase II randomized trial with a double blind design. 305 patients were randomized to receive oxygen or atmospheric air during PCI. The patients were asked to score chest pain by the Visual-Analog Scale (VAS). The use of analgesic agents and troponin-t was measured. RESULTS: There was no significant difference in pain between the groups: oxygen: 2.0, [2.0-4.0], air: 2.0, [2.0-5.0] (median, interquartile range: 25-75%, P = 0.12). The median difference in score of VAS was [95% CI]: 0, [0-1.0]. The oxygen group received 0.44 ± 0.11 mg of morphine versus 0.46 ± 0.13, P = n.s. The peak value of troponin-t post-PCI was 38, [11-352] nmol/ml in the oxygen group and 61, [16-241] for patients treated with air, P = 0.46. CONCLUSIONS: The use of oxygen during PCI did not demonstrate any analgesic effect. There was no difference in myocardial injury measured with troponin-t or in the morphine dose. Our results do not support routine use of oxygen. (NCT01413841.).