Posts by John Englert

Comparison Between Measured and Calculated Free Calcium Values at Different Serum Albumin Concentrations

Free ionic calcium is the metabolically active component of total calcium (TCa) in blood. However, most laboratories report TCa levels that are dependent on serum albumin concentration. Hence, several formulae have evolved to calculate free calcium levels from TCa after adjustment for albumin. However, free calcium can directly be measured using direction selective electrodes rather…

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Mitral Valve Repair: Moving Towards a Personalized Ring

Abstract BACKGROUND: Mitral valve repair with the use of an annuloplasty ring is the procedure of choice in patients with significant mitralregurgitation (MR) due to floppy mitral valve (FMV)/mitral valve prolapse (MVP). The mitral annular size, shape and motion may vary substantially among patients and thus, commercially available rings may not be suitable for each individual patient. METHODS: A “personalized ring” (PR) was easily constructed…

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Impact of Repositioning During Transcatheter Aortic Valve Replacement on Embolized Debris

Abstract BACKGROUND: Use of the dual-filter cerebral embolic protection (CEP) device has been linked to a lower stroke rate in patients undergoing transfemoral transcatheter aortic valve replacement (TAVR). Captured debris is found in almost every filter. The impact of repositioning on number and area of captured debris has not been studied. METHODS: Consecutive patients (n…

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Calculating Risk for Poor Outcomes After Transcatheter Aortic Valve Replacement

Abstract OBJECTIVE: To outline the tools available to help understand the risk of transcatheter aortic valve replacement (TAVR) and the gaps in knowledge regarding TAVR risk estimation. METHODS: Review of the literature. RESULTS: Two models developed and validated by the American College of Cardiology can be used to estimate the risk of short-term mortality, a 6-variable in-hospital…

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The Influence of Carbon Dioxide Field Flooding in Mitral Valve Operations With Cardiopulmonary Bypass on S100ß Level in Blood Plasma in the Aging Brain

Abstract INTRODUCTION: The risk of air microembolism during cardiopulmonary bypass (CPB) is high and influences the postoperative outcome, especially in elderly patients. The use of carbon dioxide (CO2) atmosphere during cardiac surgery may reduce the risk of cerebral air microembolism. The aim of our study was to assess the influence of CO2 field flooding on microembolism-induced…

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The Pharmacological Protection of Renal Function in Patients Undergoing Cardiac Surgery

Abstract OBJECTIVES: To compare the effects of different routes and timings of administration of dopamine and mannitol used to alleviate the adverse effects of prolonged cardiopulmonary bypass (CPB) on renal functions in coronary artery surgery. METHODS: Group I (n: 25 patients): Mannitol 1 g/kg was added into the priming solution for CPB. Group II (n: 25 patients): IV dopamine was…

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Dual Inflow Without Circulatory Arrest for Hemiarch Replacement

Abstract BACKGROUND: Open distal graft to proximal aortic arch anastomosis is central to a hemiarch replacement. Even if the ischemic tolerance time of several organs during circulatory arrest (CA) at normothermia is much longer than that of the brain, very little is known about the safety and clinical efficacy of moderate hypothermia for organ protection during…

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Cold Agglutinins in a Patient Undergoing Normothermic Cardiac Operation With Warm Cardioplegia

Abstract Cold agglutinins are autoantibodies that agglutinate red blood cells at low temperatures, leading to haemagglutination and haemolysis. They are generally of no clinical significance. However, when people with cold agglutinins undergo cardiac operation with hypothermia and coldcardioplegia, they can experience complications. Thus, different perioperative management is required for such patients. We describe a 74-year-old man with cold agglutinins incidentally detected on the preoperative…

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Tranexamic Acid Versus ɛ-Aminocaproic Acid: Efficacy and Safety in Pediatric Cardiac Surgery

OBJECTIVE: Tranexamic acid (TXA) and ɛ-aminocaproic acid (EACA) are used for antifibrinolytic therapy in cardiac surgery, although data directly comparing their blood sparing effect and their side effects, especially in paediatric cardiac surgical patients, are still missing. METHODS: We analysed perioperative data of 234 paediatric patients weighing less than 20 kg undergoing cardiac surgery. In a 5-month period,…

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Comparative Study Between Different Modes of Ventilation During Cardiopulmonary Bypass and its Effect on Postoperative Pulmonary Dysfunction

BACKGROUND: Postoperative pulmonary dysfunction is a prevalent complication after cardiac surgery; it has many contributing considerations due to either the surgery itself, anomalies to gas exchange or maybe as a result of alterations in lung mechanics. The aim of this study was to compare pressure-controlled ventilation versus volume-controlled ventilation in the presence of no ventilation…

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Minimally Invasive Biventricular Mechanical Circulatory Support With Impella Pumps as a Bridge to Heart Transplantation

Abstract Cardiogenic shock from biventricular failure that requires acute mechanical circulatory support carries high 30 day mortality. Acute mechanical circulatory support can serve as bridge to orthotopic heart transplant (OHT) in selected patients. We report a patient with biventricular failure secondary to rapidly progressive cardiac sarcoidosis refractory to medical management who was bridged to OHT…

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Impella Versus IABP in Acute Myocardial Infarction Complicated by Cardiogenic Shock.

OBJECTIVE: We investigated the benefit of Impella, a modern percutaneous mechanical support (pMCS) device, versus former standard intra-aortic balloon pump (IABP) in acute myocardial infarction complicated by cardiogenic shock (AMICS). METHODS: This single-centre, retrospective study included patients with AMICS receiving pMCS with either Impella or IABP. Disease severity at baseline was assessed with the IABP-SHOCK II score. The…

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The Effect of Ultrafiltration on End-Cardiopulmonary Bypass Hematocrit During Cardiac Surgery

OBJECTIVE: Ultrafiltration (UF) during cardiopulmonary bypass (CPB) is a well-accepted method for hemoconcentration to reduce excess fluid and increase hematocrit, platelet count and plasma constituents. The efficacy of this technique may confer specific benefit to certain patients presenting with acquired cardiac defects. The purpose of this study was to retrospectively evaluate the effect of UF on…

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Effect of Ultrafiltration on Extravascular Lung Water Assessed by Lung Ultrasound in Children Undergoing Cardiac Surgery: A Randomized Prospective Study

Ultrafiltration has been shown to decrease total body water and postoperative blood loss and improve the alveolar to arterial oxygen gradient and pulmonary compliance. This study investigated whether conventional ultrafiltration during CPB in paediatric heart surgeries influences post-bypass extravascular lung water (EVLW) assessed by lung ultrasound (LUS).

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