{"id":5433,"date":"2019-12-02T16:36:09","date_gmt":"2019-12-02T15:36:09","guid":{"rendered":"https:\/\/medicoweb.com\/main\/iris-dr-dddr-iris-d-ddd-iris-vdr-vddr\/"},"modified":"2020-02-20T09:35:22","modified_gmt":"2020-02-20T08:35:22","slug":"iris-dr-dddr-iris-d-ddd-iris-vdr-vddr","status":"publish","type":"page","link":"https:\/\/medicoweb.com\/main\/en\/iris-dr-dddr-iris-d-ddd-iris-vdr-vddr\/","title":{"rendered":"Iris DR (DDDR) \u2013 Iris D (DDD) \u2013 Iris VDR (VDDR)"},"content":{"rendered":"

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Iris DR (DDDR)
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Iris D (DDD)
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Iris VDR (VDDR)
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Advanced dual-chamber pacingwith the support of remote control<\/span><\/h4>\n
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Learn more about:<\/h6>\n

Mobile remote monitoring<\/a>\u00a0 | \"\"Single Lead VDD Pacing<\/a><\/strong>
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Diagnostic evaluation of tachycardia episodes based on an innovative electrogram ( iECG )<\/h3>\n

The iECG completes the set of electrograms recorded in the IRIS family: the band-pass filtered atrial and ventricular EGMs (supporting the pacemaker sensing function) and the corresponding wide-band EGMs, which allow a first step evaluation of signal morphology and duration. The iECG further improves this feature, providing a tracing similar to a surface ECG lead, with better visualization of the atrial activity.
\nIt is automatically recorded in the event of tachycardia (optionally complemented by the TVI tracing) to discriminate ventricular and supraventricular tachyarrhythmias, haemodynamically tolerated or not.<\/p>\n

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The iECG ventricular complex morphology is unchanged in SVTs. TVI fluctuation shows reduced amplitude, but is regularly present at every beat.<\/p>\n

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The iECG ventricular complex morphology is radically changed in VTs. The example shows a non-tolerated, spontaneously terminated VT. TVI fluctuation is abolished in the absence of ejection and is detected again as soon as sinus rhythm is reestablished.<\/p>\n

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Ventricular pacing reduction (VPR) with full respect of the haemodynamic constraints<\/h3>\n

The pacemakers of the IRIS family are designed to keep the incidence of ventricular pacing at the lowest possible limit still compatible with the haemodynamic efficiency.
\nThe stimulation could be avoided also on 2nd degree blocks which maintain the conduction ratio within the programmed limit value.<\/p>\n

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The upper limit of the accepted PR is automatically adjusted to the cardiac rate to prevent atrial systole against closed valves.<\/p>\n

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Haemodynamic surveillance and monitoring of ventricular mechanics by Transvalvular Impedance assessment (TVI)<\/h3>\n

In the IRIS family, the electrodes used for current injection and related voltage measurement are set independently.
\nThis way, ventricular motility can be assessed in different areas, to improve the characterization of ventricular mechanics and extend the diagnostic power of TVI evaluation.
\nIn the absence of external programming at 3 months from implantation, the system automatically selects the TVI configuration providing the most suitable signal.
\nIn the event of a tachycardia, the TVI tracing can compared with the basal signal, to gain information on the haemodynamic impact of the arrhythmia.
\nA TVI waveform change in the long term is a useful sign to select patients where a check of the haemodynamic function with conventional methods is advisable.<\/p>\n

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Autoregulation of atrial and ventricular sensitivity<\/h3>\n

Atrial and ventricular sensitivity is automatically adjusted to the intrinsic signal amplitude.
\nThe algorithm has been studied to provide a safety margin of at least 3X.
\nThe atrial sensitivity is programmable up to 0.08 mV, thus making the device compatible with the pacing VDD single lead.<\/p>\n

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Quick and intuitive follow-up checks<\/h3>\n