Evaluation of a Portable Recording Device (Somnocheck&lt;sup&gt;®&lt;/sup&gt;) for Use in Patients with Suspected Obstructive Sleep Apnoea

Ficker, Joachim H.; Wiest, Gunther H.; Wilpert, J.; Fuchs, Florian S.; Hahn, Eckhart G.

doi:10.1159/000050515

Cited by 43 publications

(29 citation statements)

References 7 publications

(7 reference statements)

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“…Excluding these patients, the bias of AHI was 0Ϯ12 h Ϫ1 . The measure of agreement between the 2 methods was 0.7 on statistics, which is similar to other home-based PSG recording systems [17][18][19] and satisfactory for clinical screening purposes and for monitoring treatment effects. The intraclass correlation coefficient of 0.73 indicates that 73% variation in apnea/hypopnea scores per 5-minute epoch during the entire sleep study was related to variation in reference PSG scores.…”

Section: Discussion Main Findingssupporting

confidence: 67%

Diagnosis of Sleep-Related Breathing Disorders by Visual Analysis of Transthoracic Impedance Signals in Pacemakers

et al. 2004

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Background-Minute ventilation sensors of cardiac pacemakers measure ventilation by means of transthoracic impedance changes between the pacemaker case and the electrode tip. We investigated whether this technique might detect sleep-related breathing disorders. Methods and Results-In 22 patients, analog waveforms of the transthoracic impedance signal measured by the pacemaker minute ventilation sensor over the course of a night were visualized, scored for apnea/hypopnea events, and compared with simultaneous polysomnography. Analysis of transthoracic impedance signals correctly identified the presence or absence of moderate to severe sleep apnea (apnea/hypopnea index, AHI Ͼ20 h Ϫ1 ) in all patients (receiver operating characteristics, ROCϭ1.0). The ROC for AHI scores of Ն5 h Ϫ1 and Ն10 h Ϫ1 showed an area under the curve of 0.95, PϽ0.005, and 0.97, PϽ0.0001, respectively. Accuracy over time assessed by comparing events per 5-minute epochs was high (Cronbach ␣ reliability coefficient, 0.85; intraclass correlation, 0.73). Event-by-event comparison within Ϯ15 seconds revealed agreement in 81% (, 0.77; PϽ0.001). Conclusions-Detection of apnea/hypopnea events by pacemaker minute ventilation sensors is feasible and accurate compared with laboratory polysomnography. This technique might be useful to screen and monitor sleep-related breathing disorders in pacemaker patients.

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Section: Discussion Main Findingssupporting

confidence: 67%

Diagnosis of Sleep-Related Breathing Disorders by Visual Analysis of Transthoracic Impedance Signals in Pacemakers

et al. 2004

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“…The only other study to examine the effect of CRT on CSR differed methodologically from the present study, in that the present study used comprehensive overnight, attended PSG, which monitored sleep, respiration, heart rate, PLM and body position, whereas the previous study used an ambulatory, nonattended, cardiorespiratory polygraph, which monitored respiration and heart rate alone [31,32], and has not been validated in patients with CSR. It is believed that PSG provides a more accurate estimation of apnoea frequency, reliably distinguishes obstructive and central events, which are likely to coexist in patients with heart failure, in addition to objectively monitoring sleep quality and identifying PLM.…”

Section: Limitations and Comparisons With Previous Datamentioning

confidence: 83%

Improvement in Cheyne-Stokes respiration following cardiac resynchronisation therapy

Gabor¹

2005

European Respiratory Journal

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The effect of standard cardiac resynchronisation therapy (CRT) on the severity of Cheyne-Stokes respiration (CSR) in patients with congestive heart failure was studied. It was hypothesised that CRT, through its known beneficial effects on cardiac function, would stabilise the control of breathing and reduce CSR.Twenty-eight patients who were eligible for CRT and receiving optimised medical treatment for congestive heart failure were referred for overnight polysomnography, including monitoring of thoracic and abdominal movements to identify CSR and obstructive sleep apnoea events. Patients underwent repeat polysomnography after 6 months of CRT to re-evaluate sleep quality and sleepdisordered breathing.Twelve of the 28 patients had significant CSR (43%); 10 patients had a successful implantation and underwent repeat polysomnography a mean¡SD 27¡7 weeks after continuous biventricular pacing. Six of the 10 patients experienced a significant decrease in CSR severity following CRT, associated with correction of congestive heart failure-related hyperventilation and hypocapnia. Circulation time, oxygen saturation, frequency of obstructive apnoeas and sleep quality did not change.In conclusion, cardiac resynchronisation therapy is associated with a reduction in CheyneStokes respiration, which may contribute to improved clinical outcome in patients treated with cardiac resynchronisation therapy.

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“…However, different studies investigating the ability of polygraphy to detect sleep-disordered breathing showed a high diagnostic accuracy of the portable recording devices [42][43][44]. It is unlikely that the additional information on sleep stages given by polysomnography would profoundly modify the results.…”

Section: Limitationsmentioning

confidence: 99%

Impact of obstructive sleep apnoea on diastolic function

et al. 2012

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We investigated whether obstructive sleep apnoea (OSA) independently affects diastolic function in a primary care cohort of patients with cardiovascular risk factors.378 study participants with risk factors for diastolic dysfunction were prospectively included and a polygraphy was performed in all patients. Diastolic dysfunction was assessed by comprehensive echocardiography including tissue Doppler. Sleep apnoea was classified according to apnoea/ hypopnoea index (AHI) as none (AHI ,5 events?h ). Patients with central sleep apnoea (n514) and patients with previously diagnosed sleep apnoea (n512) were excluded. In the remaining 352 subjects, 21.6% had an AHI o15 events?h -1 . The prevalence of diastolic dysfunction increased with the severity of sleep apnoea from 44.8% (none) to 56.8% (mild) to 69.7% (moderate-to-severe sleep apnoea) (p50.002). The degree of diastolic dysfunction also increased with sleep apnoea severity (p50.004). In univariate regression analysis, age, desaturation index, AHI, cardiac frequency, angiotensin receptor 1 antagonist therapy, body mass index (BMI) and left ventricular mass were associated with diastolic dysfunction. In multivariate regression analysis, only age, BMI, AHI and cardiac frequency were independently associated with diastolic dysfunction.Moderate-to-severe OSA is independently associated with diastolic dysfunction in patients with classical risk factors for diastolic dysfunction.

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Evaluation of a Portable Recording Device (Somnocheck<sup>®</sup>) for Use in Patients with Suspected Obstructive Sleep Apnoea

Cited by 43 publications

References 7 publications

Diagnosis of Sleep-Related Breathing Disorders by Visual Analysis of Transthoracic Impedance Signals in Pacemakers

Diagnosis of Sleep-Related Breathing Disorders by Visual Analysis of Transthoracic Impedance Signals in Pacemakers

Improvement in Cheyne-Stokes respiration following cardiac resynchronisation therapy

Impact of obstructive sleep apnoea on diastolic function

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