Diagnostic performance of dobutamine stress echocardiography: A South African experience

Dobutamine stress echocardiography (DSE) is a well-established modality for the diagnosis of coronary artery disease, but there are no reported diagnostic data in southern Africa. Objectives. To compare the safety, sensitivity and specificity of a South African (SA) DSE programme with larger, international series. Methods. All patients undergoing DSE from 2019 to 2021 at a single SA centre were included. A new wall motion abnormality (≥2 segments) signified inducible ischaemia. Results. A total of 106 patients (mean (standard deviation) age 61 (11) years, 68% male) were analysed. Six patients (6%) experienced chest pain during DSE and 4 (4%) developed an atrial arrhythmia. The sensitivity and specificity for epicardial coronary stenosis were 77% and 74%, respectively, changing to 82% and 72% when excluding those who had previous coronary artery bypass surgery. Conclusion. The sensitivity, specificity and safety of an SA DSE programme were comparable to international series. A DSE programme is feasible in a resource-constrained environment.

Percutaneous left atrial appendage occlusion: A South African experience

BACKGROUND

Atrial fibrillation (AF) is associated with all-cause mortality, heart failure and non-fatal stroke, and thromboprophylaxis is traditionally provided with oral anticoagulants (OACs). Percutaneous left atrial appendage occlusion (LAAO) with a dedicated device is an alternative approach to thromboprophylaxis in patients with AF who are: (i) intolerant to OACs (e.g. life-threatening haemorrhage); (ii) non-adherent to OACs; or (iii) at a high bleeding risk with OACs. Non-inferiority of LAAO compared with OACs was demonstrated in e.g. the WATCHMAN Left Atrial Appendage System for Embolic Protection in Patients With Atrial Fibrillation (PROTECT AF) trial. Only very limited data are available on percutaneous LAAO in South Africa (SA), and no local outcome data have been reported.

OBJECTIVES

To compare the safety and efficacy outcomes of an SA percutaneous LAAO programme with larger international series.

METHODS

All patients undergoing percutaneous LAAO from 2013 to 2020 at a single centre (SAEndovascular, Kuils River Netcare Hospital, SA) were included from an ongoing registry. Survival analysis was performed with the Kaplan-Meier method.

RESULTS

Of 101 LAAO recipients (mean (standard deviation) age 77 (10) years, 64% male) analysed, 90 (90%) had permanent AF, 1 (1%) persistent AF and 9 (9%) paroxysmal AF. The most common indication for LAAO was previous severe bleeding (n=23; 23%). The mean device size was 23 (3) mm and the procedural success rate was 98%. After a median (interquartile range) follow-up of 21 (5 - 41) months, 6 patients (6%) experienced stroke or all-cause mortality. Four patients (4%) had a life-threatening procedural complication (tamponade n=2 (2%) and device embolisation n=2 (2%)). These outcomes are comparable to large international series, e.g. PROTECT AF.

CONCLUSIONS

The safety and efficacy outcomes of an SA percutaneous LAAO programme were comparable to large international series. A successful percutaneous LAAO programme is feasible in a southern African context.

Cancer nutrition and rehabilitation-its time has come!

Cancer is a systemic disease that can affect nearly every organ in the body, resulting in a progressive loss of organ function. That loss of function may be initially slow, having minimal effect, or it may be rapid, resulting in more dramatic changes.

The usual medical management of patients with cancer has focused more specifically on the administration of cytotoxic treatments. These treatments can potentially eradicate or minimize the tumour, but they may also have toxic side effects that in turn can also affect the patient.

Cancer rehabilitation is a process that assists the individual with a cancer diagnosis to obtain optimal physical, social, psychological, and vocational functioning within the limits created by the disease and its treatment. The McGill Cancer Nutrition and Rehabilitation (cnr) program developed as a result of the ever-increasing demand for a focus on addressing individual cancer patients and their needs, as well as on achieving optimal tumour-related outcomes. Using an interdisciplinary approach, the cnr’s global objective is to empower individuals who are experiencing loss of function, fatigue, malnutrition, psychological distress, and other symptoms as a result of cancer or its treatment to improve their own quality of life. All team members—experts in their respective fields—assess all patients. At a subsequent team discussion and planning meeting, a specific 8-week program is designed for each patient. The hoped-for outcome for the cnr program is primarily to empower patients to “take control” or to enable them to improve their own quality of life. This article reviews the philosophy of the cnr’s approach and the roles played by the various members of the team.