Evaluation of 1-minute heart rate variability during deep breathing as a prognostic indicator in patients with acute myocardial infarction

Pai , Narasimha and Adhikari , Prabha M.R and Madi , Deepak and Achappa, Basavaprabhu and Pai , Shivananda and *, Unnikrishnan B (2012) Evaluation of 1-minute heart rate variability during deep breathing as a prognostic indicator in patients with acute myocardial infarction. Inernational Journal of Biological & Medical Research, 3 (3). pp. 2103-2106.

[img] Video (MPEG)
evaluation_of_1_minute_heart_rate_variability_during_deep_breathing_as_a_prognostic_indicator_in_patients_with_acute_myocardial - Published Version
Restricted to Registered users only

Download (145kB) | Request a copy

Abstract

Background and objective- Heart rate variability (HRV) is a noninvasive electrocardiographic marker reflecting the activity of the sympathetic and vagal components of the autonomic nervous system on the sinus node of the heart. Decreased HRV is a risk factor for both arrhythmic and non-arrhythmic deaths following acute myocardial infarction (MI) .Our aim was to find out the utility of heart rate variability (during deep breathing over 1 minute ) in predicting end point cardiac events (risk stratification) in patients after an episode of acute myocardial infarction. Material and methods- Bedside heart rate variability (HRV) during deep breathing was assessed in 100 patients after a first episode of myocardial infarction.. This test was performed between 6-48 hours after the first attack of myocardial infarction. We defined low HRV as HRV < 10 beats/minute. The patients were followed up over a duration of 3 months to document end point cardiac events. Statistical analysis was done using the student ‘t’ test . Results- Heart rate variability (HRV) < 10 beats/minute was seen in 44 (44%) patients. 16 patients died in the follow up period. Among the 16 patients who died 15 (93.75%) patients had HRV < 10 beats/minute. Conclusion- Heart rate variability (HRV) during deep breathing is a simple, cost effective bedside test in risk stratification of patients who present with myocardial infarction.

Item Type: Article
Subjects: Medicine > KMC Mangalore > Medicine
Depositing User: KMCMLR User
Date Deposited: 04 Sep 2012 05:02
Last Modified: 04 Sep 2012 05:02
URI: http://eprints.manipal.edu/id/eprint/77109

Actions (login required)

View Item View Item