Ability of Home Monitoring® to Detect and Manage the Inappropriate Diagnoses in Implantable Cardioverter Defibrillators.
- Conditions
- Ventricular FibrillationSudden Cardiac DeathAtrial FibrillationVentricular TachycardiaICD
- Registration Number
- NCT01594112
- Lead Sponsor
- Biotronik SE & Co. KG
- Brief Summary
The purpose of the THORN registry is to show the ability of Home-Monitoring® to early identify and manage the inappropriate diagnoses of ventricular arrhythmia in ICD patients (i.e. lead rupture, atrial arrhythmia, oversensing...) whatever the type of device (single, dual, or triple chamber).
The electromyograms (iEGMs) provided by Remote Patient Monitoring will help the physician to early detect inadequate arrhythmia detection (ID) that can be responsible for inappropriate therapies (IT), and to take preventive actions in order to reduce the burden of these inappropriate therapies.
THORN is an observational epidemiologic, prospective and multicenter registry. The primary objective is to measure the relative proportion of patients experiencing at least one inappropriate therapy during a fifteen months follow-up period. Moreover, THORN will assess the incidence, predictors, outcome and recurrence of inappropriate diagnoses in 1750 ICD patients.
- Detailed Description
Remote Patient Monitoring allows early detection of events that can generate inadequate detection of ventricular arrhythmia (i.e. lead rupture, atrial arrhythmia, oversensing....) and be responsible for inappropriate therapies. In such cases, it may be assumed that physicians can react earlier and take preventive actions, in order to reduce the risk or burden of inappropriate therapies.
The THORN registry has two purposes:
* To determine retrospectively the relative proportion of patients experiencing at least one inappropriate therapy during 15-months of follow-up, in ICD patients equipped with Home Monitoring®. This part concern 1240 patients.
* To evaluate prospectively the relationship between the detection of inappropriate diagnosis (with or without subsequent inappropriate therapy), the corrective action taken, and the recurrences of inappropriate diagnosis of the same origin/mechanism. This part concerns 510 patients.
BIOTRONIK Home Monitoring® by iEGM-Online® with Biotronik ICD devices (LUMAX) systematically stores any episode classified as ventricular tachycardia (VT) or ventricular fibrillation (VF) which is transmitted to the physician.
In the THORN study, in addition to the physicians' analysis, all electromyograms will be reviewed by an adjudication committee in order to classify them as appropriate or inappropriate diagnosis.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 512
- Subject implanted with a single, dual, or triple chambers ICD within the last 3 months
- Home Monitoring® activated and functional since hospital discharge
- Patient willing and able to comply with the protocol and who has provided written informed consent about Home Monitoring®,
- Patient whose medical situation is stable
- ICD replacements
- New York Heart Association Function Class IV patients
- Pregnant women or women who plan to become pregnant during the trial
- Presence of any disease, other than patient's cardiac disease, associated with reduced likelihood of survival for the duration of the trial, e.g. cancer, uraemia (urea > 70mg/dl or creatinine >3mg/dl), liver failure, etc.
- Age < 18 years
- Patient unable to handle the Biotronik's transmitter correctly
- Change of residence expected during the study
- Insufficient global system for mobile communication (GSM) coverage at patient's home
- Participation in another clinical study
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Relative proportion of patients experiencing at least one inappropriate therapy (retrospective part) or more than one inappropriate therapy (prospective part) 15 months Study of the relationship between the detection of ID, the corrective action taken and the recurrence of ID of the same mechanism.
- Secondary Outcome Measures
Name Time Method Time to the first ID 15 months The time from the enrolment until the first EGM revealing the ID will be assessed.
Number of diagnoses per patient per year and relative proportion of patients with at least one diagnosis 15 months The number of diagnoses per patient per year and the associated proportion of patients (with at least one diagnosis) will be measured. This will give the incidence rate of experiencing special classes of diagnoses over the 15-months follow-up period. The following subclasses will be assessed:
Appropriate or not diagnoses, ID without therapy, therapies defined as shocks or antitachycardia pacing (ATP), shocks, inappropriate shocks, recurrence of ID and recurrence of inappropriate shocks.
The prospective part will be compared to the retrospective part.Relative proportion of patients with a second day of ID 15 months Knowing that the intervals between ID days cannot be predetermined (non normal distribution), medical reaction time anticipated with Home Monitoring® can reduce the number of patients with a second day of ID.
The proportion of patients with more than one inappropriate diagnosis will be measured.Number of Asymptomatic Inappropriate therapy and Inappropriate therapy without diagnosis 15 months Knowing that the main added value of Home Monitoring® relates on asymptomatic inappropriate therapies and inappropriate diagnoses without therapy (IDWT), the number of asymptomatic IT or IDWT patient per year and the associated proportion of patients (with at least one inappropriate diagnosis) will be measured.
Medical reaction time to the ID 15 months The time from the first ID to the follow-up visit during which a corrective action is taken is defined as the medical reaction time and will be assessed.
In case of hospitalization without a follow-up visit (lead replacement for instance), the first day of hospitalization will be considered as the follow-up visit date.
In current practice, the patients receiving shocks are advised to call their physicians in order to have their ICD interrogated. The analysis will distinguish the symptomatic IT and the asymptomatic ID (asymptomatic IT or IDWT).Number of days of recurrence within the medical reaction time 15 months The number of days with at least one ID within the medical reaction time is defined as the number of days of recurrence and will be evaluated with the associated proportion of patients. The analysis will distinguish the symptomatic IT and the asymptomatic ID (asymptomatic IT or IDWT).
Effectiveness of the corrective action and analysis according to the initial ID type 15 months The proportion of patients with at least one inappropriate diagnosis recurrence (first day of recurrence) after the corrective action, and with the same ID mechanism as the original one, will be evaluated.
A subgroup analysis depending on the ID mechanism will be performed, considering the inhomogeneous efficiency of the corrective action depending on the initial mechanism of the inappropriate diagnosis/therapy .
The time from the follow-up visit during which the corrective action is taken until the next ID will be measured to assess the effectiveness of the corrective action.Classification of ID 15 months The proportion of patient in the following classes of ID episodes will be evaluated:
* Atrial fibrillation,
* Other forms of supraventricular tachyarrhythmia
* Sinus tachycardia
* Abnormal sensing (T wave oversensing, interferences,...)
* Other: the comparison is performed as an inter observer comparison between the Adjudication Board's and the physician's classification.Total number of hospitalizations/deaths related to ID and IT 15 months Knowing that inappropriate therapies are among the heaviest ICD side-effects, the total number of hospitalizations and deaths related to ID or IT will be assessed.
Risk of all-cause mortality 15 months The risk of death associated with inappropriate therapy only, with the inappropriate shocks only, with any shocks, without any therapy, without any shocks will be evaluated.
Trial Locations
- Locations (55)
CH de la Cote Basque
🇫🇷Bayonne, France
Clinique Saint Augustin
🇫🇷Bordeaux, France
Clinique du Milénaire
🇫🇷Montpellier, France
CHU la Mileterie
🇫🇷Poitiers, France
CHU Bordeaux
🇫🇷Pessac, France
CHU de Nancy
🇫🇷Bourgogne, France
CHU de Montpellier
🇫🇷Montpellier, France
CH de Moulins
🇫🇷Moulins, France
CHU G. & R. Laënnec
🇫🇷Nantes, France
CHU Nîmes
🇫🇷Nimes, France
CH de Saint Brieuc
🇫🇷Saint Brieuc, France
CH St Luc St Joseph
🇫🇷Lyon, France
Clinique de la Sauvegarde
🇫🇷Lyon, France
CH William-Morey
🇫🇷Chalons sur Saone, France
CHG de Chateauroux
🇫🇷Chateauroux, France
Hôpital Font Pré
🇫🇷Toulon, France
CH de Troyes
🇫🇷Troyes, France
Hôpital Georges Pompidou
🇫🇷Paris, France
CH d'Aix en Provence
🇫🇷Aix en Provence, France
CH d'Angers
🇫🇷Angers, France
CH d'Avignon
🇫🇷Avignon, France
Clinique Lafourcade
🇫🇷Bayonne, France
CHU la Cavale Blanche
🇫🇷Brest, France
Hôpital Militaire
🇫🇷Clamart, France
CHU Clermont-Ferrand
🇫🇷Clermont-Ferrand, France
Centre Hospitalier Sud Francilien
🇫🇷Corbeil Essonnes, France
Hôpital Albert Schweitzer
🇫🇷Colmar, France
CH de Lagny sur Marne
🇫🇷Lagny-sur-Marne, France
CH de DAX
🇫🇷Dax, France
CHU de Dijon
🇫🇷Dijon, France
Hôpital Cardiologique
🇫🇷Lyon, France
Hôpital Nord
🇫🇷Marseille, France
CHU Albert Michalon
🇫🇷Grenoble, France
CH de Haguenau
🇫🇷Haguenau, France
CH Robert Boulin
🇫🇷Libourne, France
Hôpital La Timone
🇫🇷Marseille, France
CHRU de Lille
🇫🇷Lille, France
Institut Jacques Cartier
🇫🇷Massy, France
CHI de Montfermeil
🇫🇷Montfermeil, France
Clinique Ambroise Paré
🇫🇷Nancy, France
CH de Pau
🇫🇷Pau, France
CH de Périgueux
🇫🇷Perigueux, France
CHU (Hôpital Pontchaillou)
🇫🇷Rennes, France
Clinique Saint Pierre
🇫🇷Perpignan, France
Chu Hôpital Charles Nicolle
🇫🇷Rouen, France
Clinique Pasteur
🇫🇷Toulouse, France
CH de Rodez
🇫🇷Rodez, France
CH de Valence
🇫🇷Valence, France
CHU de St-Etienne
🇫🇷Saint Etienne, France
CH d'Angoulême
🇫🇷Saint Michel, France
CHRU Tours (Hôpital Trousseau)
🇫🇷Tours, France
CH de Valenciennes
🇫🇷Valenciennes, France
CH Bretagne Atlantique
🇫🇷Vannes, France
CH de Villefranche
🇫🇷Villefranche sur Saone, France
Clinique Saint Joseph
🇫🇷Trelaze, France