open access

Vol 19, No 2 (2012)
Original articles
Published online: 2012-03-30
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Assessment of the relationship between non-dipping phenomenon and heart rate turbulence

Levent Sahiner, Sercan Okutucu, Ugur Nadir Karakulak, Kudret Aytemir, Sefik Gorkem Fatihoglu, Ergun Baris Kaya, Giray Kabakci, Lale Tokgozoglu, Hilmi Ozkutlu, Ali Oto
Cardiol J 2012;19(2):140-145.

open access

Vol 19, No 2 (2012)
Original articles
Published online: 2012-03-30

Abstract

Background: The aim of this cross-sectional study was to evaluate cardiac autonomic function by heart rate turbulence (HRT) indices in normotensive and hypertensive individuals with either non-dipper or dipper type circadian rhythm of blood pressure (BP).
Methods: A total of 122 patients were allocated into four groups: normotensive/dipper, n = 33; normotensive/non-dipper, n = 31; hypertensive/dipper, n = 29; and hypertensive/non-dipper, n = 29. HRT indices (turbulence slope [TS] and turbulence onset [TO]) were calculated from 24-h ambulatory electrocardiographic recordings.
Results: TS values were higher (TS = 10.0 ± 3.4 vs 8.0 ± 1.5, p = 0.004) and TO values were lower (TO = –2.9 [–3.6, –2.2] vs –2.0 [–2.3, –1.9], p = 0.037) in the dipper subgroup of normotensive cases than in the non-dipper subgroup of normotensive cases. Similarly, TS values were higher (TS = 8.4 ± 3.5 vs 6.2 ± 2.9, p = 0.012) and TO values were lower (TO = –2.1 [–3.4, –2.0] vs –1.6 [–1.9, –0.2], p = 0.003) in the dipper subgroup of hypertensive cases than in the non-dipper subgroup of hypertensive cases. Spearman’s correlation analyses revealed a high positive correlation between percentage of dipping and TS (r = 0.600, p = 0.001) and a higher negative correlation between percentage of dipping and TO (r = –0.653, p = 0.001).
Conclusions: Blunting of the nocturnal fall in BP is associated with impaired HRT indices in both normotensive and hypertensive groups. (Cardiol J 2012; 19, 2: 140–145)

Abstract

Background: The aim of this cross-sectional study was to evaluate cardiac autonomic function by heart rate turbulence (HRT) indices in normotensive and hypertensive individuals with either non-dipper or dipper type circadian rhythm of blood pressure (BP).
Methods: A total of 122 patients were allocated into four groups: normotensive/dipper, n = 33; normotensive/non-dipper, n = 31; hypertensive/dipper, n = 29; and hypertensive/non-dipper, n = 29. HRT indices (turbulence slope [TS] and turbulence onset [TO]) were calculated from 24-h ambulatory electrocardiographic recordings.
Results: TS values were higher (TS = 10.0 ± 3.4 vs 8.0 ± 1.5, p = 0.004) and TO values were lower (TO = –2.9 [–3.6, –2.2] vs –2.0 [–2.3, –1.9], p = 0.037) in the dipper subgroup of normotensive cases than in the non-dipper subgroup of normotensive cases. Similarly, TS values were higher (TS = 8.4 ± 3.5 vs 6.2 ± 2.9, p = 0.012) and TO values were lower (TO = –2.1 [–3.4, –2.0] vs –1.6 [–1.9, –0.2], p = 0.003) in the dipper subgroup of hypertensive cases than in the non-dipper subgroup of hypertensive cases. Spearman’s correlation analyses revealed a high positive correlation between percentage of dipping and TS (r = 0.600, p = 0.001) and a higher negative correlation between percentage of dipping and TO (r = –0.653, p = 0.001).
Conclusions: Blunting of the nocturnal fall in BP is associated with impaired HRT indices in both normotensive and hypertensive groups. (Cardiol J 2012; 19, 2: 140–145)
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Keywords

ambulatory blood pressure; heart rate turbulence; dipper

About this article
Title

Assessment of the relationship between non-dipping phenomenon and heart rate turbulence

Journal

Cardiology Journal

Issue

Vol 19, No 2 (2012)

Pages

140-145

Published online

2012-03-30

Bibliographic record

Cardiol J 2012;19(2):140-145.

Keywords

ambulatory blood pressure
heart rate turbulence
dipper

Authors

Levent Sahiner
Sercan Okutucu
Ugur Nadir Karakulak
Kudret Aytemir
Sefik Gorkem Fatihoglu
Ergun Baris Kaya
Giray Kabakci
Lale Tokgozoglu
Hilmi Ozkutlu
Ali Oto

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