{"id":5337,"date":"2011-12-21T12:02:26","date_gmt":"2011-12-21T12:02:26","guid":{"rendered":"https:\/\/medicoweb.com\/main\/special-functions\/"},"modified":"2020-02-20T09:44:54","modified_gmt":"2020-02-20T08:44:54","slug":"special-functions","status":"publish","type":"page","link":"https:\/\/medicoweb.com\/main\/en\/special-functions\/","title":{"rendered":"Special functions"},"content":{"rendered":"<h3>Special functions:<\/h3>\n<hr \/>\n<h3>Automatic calibration of TVI recording<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-1763\" title=\"calibrazione\" src=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/calibrazione.jpg\" alt=\"\" width=\"644\" height=\"193\" srcset=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/calibrazione.jpg 644w, https:\/\/medicoweb.com\/main\/wp-content\/uploads\/calibrazione-300x90.jpg 300w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><br \/>\nThe function allows the automatic individual regulation of TVI configuration and sampling current, starting from 3 months after implantation. This way, all TVI-related functions can easily be enabled.<\/p>\n<p>&nbsp;<\/p>\n<h3>Long-term comparison of TVI waveform<\/h3>\n<p>Averaged TVI signals recorded at different times and stored in the pacemaker memory can simultaneously be displayed to check for long-term hemodynamic stability.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-3263 size-full\" title=\"Long-term comparison of TVI waveform\" src=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/confronto_lungo_termine_eng.png\" alt=\"\" width=\"644\" height=\"457\" srcset=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/confronto_lungo_termine_eng.png 644w, https:\/\/medicoweb.com\/main\/wp-content\/uploads\/confronto_lungo_termine_eng-300x213.png 300w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\">Ejection check after ventricular pacing<\/h3>\n<p style=\"text-align: justify;\">The TVI signal is applied to confirm the actual occurrence of ejection after a ventricular pacing pulse. In the event of missed ejection, the pulse energy is increased to restore effective stimulation.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-2183\" title=\"Ejection check after ventricular pacing\" src=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/verifica_eiezione_dopo_pacing.jpg\" alt=\"\" width=\"644\" height=\"320\" srcset=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/verifica_eiezione_dopo_pacing.jpg 644w, https:\/\/medicoweb.com\/main\/wp-content\/uploads\/verifica_eiezione_dopo_pacing-300x149.jpg 300w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><br \/>\nIf the expected TVI increase is not recorded after a pacing pulse, failure of ventricular capture is assumed and the pulse energy is increased.<br \/>\nThe pacemaker stores in memory the number of no capture alarms and the trend of pulse parameters.<\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\">Ejection Check After Ventricular Sensing<\/h3>\n<p style=\"text-align: justify;\">The TVI signal is applied to confirm the actual occurrence of ejection after a ventricular sensing event. In case of missed ejection, the pacing mode is switched over from any ventricular-inhibited to the corresponding ventricular-triggered mode, in order to prevent the risk of false inhibition induced by oversensing.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-2185\" title=\"Ejection Check After Ventricular Sensing\" src=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/verifica_eiezione_dopo_sensing.jpg\" alt=\"\" width=\"644\" height=\"320\" srcset=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/verifica_eiezione_dopo_sensing.jpg 644w, https:\/\/medicoweb.com\/main\/wp-content\/uploads\/verifica_eiezione_dopo_sensing-300x149.jpg 300w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><br \/>\nIf the expected TVI increase is not recorded after a series of 3 ventricular sensing events, any V-inhibited pacing mode is switched over to the corresponding V-triggered one, in order to ensure safety stimulation.<br \/>\nV-triggered and inhibited pacing are alternated at every beat, so that the programmed pacing mode is re-established as soon as a reliable sensing function is restored.<br \/>\nThe number of no-ejection alarms after ventricular sensing is stored in memory.<\/p>\n<p>&nbsp;<\/p>\n<h3>Prevention of ventricular pacing<\/h3>\n<p>In the presence of intrinsic AV conduction, the minimal incidence of right ventricular pacing is ensured by automatic switching over from dual-chamber to atrial only pacing.<br \/>\nThe maximum intrinsic PR interval allowed is shortened as a function of cardiac rate, to prevent the risk of atrial systole with closed AV valves.<br \/>\n<a href=\"https:\/\/medicoweb.com\/main\/funzioni-speciali\/pr_consentito_eng\/\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-3268 size-full\" src=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/pr_consentito_eng.jpg\" alt=\"\" width=\"644\" height=\"474\" srcset=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/pr_consentito_eng.jpg 644w, https:\/\/medicoweb.com\/main\/wp-content\/uploads\/pr_consentito_eng-300x221.jpg 300w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><\/a><br \/>\nThe actual presence of intrinsic ventricular activity can optionally be tested by TVI-based ejection check.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-1769\" title=\"algoritmo_minimizzazione\" src=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/algoritmo_minimizzazione.jpg\" alt=\"\" width=\"644\" height=\"320\" srcset=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/algoritmo_minimizzazione.jpg 644w, https:\/\/medicoweb.com\/main\/wp-content\/uploads\/algoritmo_minimizzazione-300x149.jpg 300w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\">Recognition of catheter type and implantation date<\/h3>\n<p style=\"text-align: justify;\">The pacemaker can recognize the polarity of the implanted leads and store the implantation date in memory.<\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\">Automatic polarity switch<\/h3>\n<p style=\"text-align: justify;\">In case of pacing impedance measurements outside the expected normal range, pacing and sensing polarities are switched to unipolar.<\/p>\n<p>&nbsp;<\/p>\n<p align=\"center\"><a href=\"#top\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/medicoweb.com\/main\/wp-content\/uploads\/torna_su.png\" alt=\"\" width=\"28\" height=\"28\" \/> Return to top<\/a><\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><span style=\"text-align: center; font-size: 16px;\"> <a title=\"Products\" href=\"https:\/\/medicoweb.com\/main\/en\/products\"><strong>Products<\/strong><\/a> | <a title=\"Technology\" href=\"https:\/\/medicoweb.com\/main\/en\/technology\"><strong>Technology<\/strong><\/a> | <a title=\"Support\" href=\"https:\/\/medicoweb.com\/main\/en\/support\"><strong>Support<\/strong><\/a> | <a title=\"Contacts\" href=\"https:\/\/medicoweb.com\/main\/en\/contacts\"><strong>Contacts<\/strong><\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Special functions: Automatic calibration of TVI recording The function allows the automatic individual regulation of TVI configuration and sampling current, starting from 3 months after implantation. This way, all TVI-related functions can easily be enabled. &nbsp; Long-term comparison of TVI&hellip; <\/p>\n","protected":false},"author":1,"featured_media":5338,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5337","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Special functions - MEDICO S.R.L.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/medicoweb.com\/main\/en\/special-functions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Special functions - MEDICO S.R.L.\" \/>\n<meta property=\"og:description\" content=\"Special functions: Automatic calibration of TVI recording The function allows the automatic individual regulation of TVI configuration and sampling current, starting from 3 months after implantation. 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