Urgent recall : Resmed ASV machines could increase mortality risk in heart failure

Urgent recall : Resmed ASV machines could increase mortality risk in heart failure

Central Sleep Apnoea (CSA) in the setting of Heart Failure usually presents as Cheyne Stokes Respiration (CSR) on a sleep study. One of the ways to attempt to correct CSR is with a particular kind of PAP machine called “ASV”… Auto Servo Ventilation.

ASV machines map your breathing, and apply particular pressures on a breath-to-breath basis.

Today, Resmed released an Urgent Recall of their ASV machines because of an apparent safety concern.

Preliminary analysis of their data suggests an exceedingly high risk of cardiovascular death (33.5% higher) in those with Heart Failure using ASV, compared to those not on ASV.

At Adelaide Sleep, we keep abreast of all new Sleep Developments. All of our patients are consulted before and after their sleep studies, and before and after their treatment commencement, as per the current recommendations by the Australasian Sleep Association (ASA). We do not believe in direct-CPAP-outlet sales, nor do we believe in direct-to-consumer-sleep-study services. By seeing a Medical Specialist, you would’ve had a face-to-face medical consultation regarding your ASV machine.

If you believe that you are on an ASV machine, and would like to speak to a Medical Specialist regarding this, contact us now.

Addit : Philips Respironics have also released a statement echoing that of Resmed – caution in prescribing and using their BiPAP autoSV / BiPAP autoSV Advanced therapy machines and algorithm, in the at-risk group.

© APSS 2015

CPAP prevents Atrial Fibrillation (AF) in OSA

Previously we described how those with Obstructive Sleep Apnoea (OSA) have a 4-fold increased risk of Atrial Fibrillation (AF)… and how it also significantly increases the risk of recurrence to AF even after procedures such as cardioversion and cardiac ablation.

There is now evidence that treating OSA with CPAP can significantly decrease AF recurrence.

Shukla et al performed a meta-analysis across seven large cardiac studies, totalling over 1000 patients with OSA+AF. If you have OSA+AF, and use CPAP, then your relative risk (RR) is reduced by a tremendous 42%. This was completely independent of whether or not you underwent cardiac ablation!

This confirms our understanding of why OSA is such an important and underestimated condition. CPAP prevents atrial fibrillation recurrence in those with OSA.

We recommend that everyone with AF should consider an in-hospital sleep study.

Contact us now if you’d like to discuss this further.

1.Shukla et al. JACC Electrophysiol. 2015.

© APSS 2015