Single center experience with intrathoracic impedance monitoring.

Abstract:

BACKGROUND:The Medtronic InSync Sentry is the first available cardiac resynchronization therapy defibrillator (CRT-D) which can monitor fluid status by measuring intrathoracic impedance. This study was designed to observe the effectiveness of intrathoracic impedance monitoring on detecting aggravation of heart failure. METHODS:We retrospectively analyzed the clinical data of 14 consecutive patients. Patients were regularly followed up every 3 - 6 months after the implantation. At each visit, interrogation of the device was done. Patients were instructed to inform the researcher on hearing the device alert, and to take extra 40 milligrams of furosemidum if they had aggravated symptoms later. If the symptoms could not be relieved, they were asked to see a doctor. Data about heart failure hospitalization were collected from the medical record. RESULTS:During 18 - 48 months follow-up, a total of 7 patients encountered 28 alert events. On one hand, alert events appeared before all deteriorated symptoms and heart failure hospitalizations. On the other hand, there were 23 alerts followed by deterioration of heart failure symptoms, and 2 alerts related to 2 hospitalizations caused by pulmonary infection in one patient. Only 5 patients were hospitalized 10 times for deterioration of cardiac function. CONCLUSION:The function of intrathoracic impedance monitoring is reliable in predicting deterioration of heart failure.

journal_name

Chin Med J (Engl)

journal_title

Chinese medical journal

authors

Qiao Q,Hua W,Ding LG,Chen KP,Wang J,Wang FZ,Zhang S

subject

Has Abstract

pub_date

2011-07-01 00:00:00

pages

2219-21

issue

14

eissn

0366-6999

issn

2542-5641

journal_volume

124

pub_type

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