The effect of deep breathing test on heart rate variability in obese and non-obese patients with myocardial infarction

Introduction and Aim:Obesity and metabolic syndrome increases the risk of cardiovascular diseases (CVD).The acute myocardial infarction may be associated with autonomic dysfunction and it may have a bearing on the prognosis. The objective of the study wasto examine the effect of deep breathing test on heart rate variability in obese and non-obese patients with myocardial infarction (MI). Materials and Methods:The patients with acute myocardial infarction were confirmed by universal definition and treatment was administered. At 12 weeks of follow up, the MI patients were screened and divided into two groups. 30 patients of MI with BMI 25 to 30 kg/m2 formed the obese group.30 patients of MI with BMI 18.5 to 24.9 kg/m2 formed the non-obese group. The baseline ECG was taken for 5 minutes by using Niviqure B3 machine for HRV analysis. Then, deep breathing test (DBT) was performed in a standardized manner. Results:The two groupswere well matched for the age (53.7±11.5 vs.55.2±9.2years).In the baseline there was a statistically significant decrease in the total power (TP) of the heart i.e., HF plus LF (2178±762ms2 vs2991±771ms2 with a ‘p’ value 0.001) in the obese group when compared to non-obese group. On DBT there was a significant decrease in heart rate (81bpm to 65bpm) in non-obese group. However, in obese group there was no significant decrease in heart rate (79bpm to 72bpm) on DBT. Conclusion: Accordingly, we concludethat in obese patients with MI there is a reduction in respiratory vagal modulation of heart rate during DBT.

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Heart Rate Variability Assessment Early After Acute Myocardial Infarction

Circulation ◽

10.1161/01.cir.93.7.1388 ◽

1996 ◽

Vol 93 (7) ◽

pp. 1388-1395 ◽

Cited By ~ 70

Author(s):

Narendra Singh ◽

Dmitry Mironov ◽

Paul W. Armstrong ◽

Allan M. Ross ◽

Anatoly Langer

Keyword(s):

Myocardial Infarction ◽

Acute Myocardial Infarction ◽

Heart Rate ◽

Heart Rate Variability

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534 Left ventricle diastolic function after acute myocardial infarction: association with autonomous nervous balance assessed by heart rate variability

European Journal of Echocardiography ◽

10.1016/s1525-2167(06)60324-7 ◽

2006 ◽

Vol 7 ◽

pp. S87-S87

Author(s):

S POTASHEV ◽

M DOLZHENKO

Keyword(s):

Myocardial Infarction ◽

Acute Myocardial Infarction ◽

Heart Rate ◽

Heart Rate Variability ◽

Left Ventricle ◽

Diastolic Function

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Features of heart rate variability in patients with takotsubo syndrome

European Heart Journal Acute Cardiovascular Care ◽

10.1093/ehjacc/zuab020.187 ◽

2021 ◽

Vol 10 (Supplement_1) ◽

Author(s):

D Evdokimov ◽

SA Boldueva ◽

VS Feoktistova ◽

TA Baeva

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Sinus Rhythm ◽

Autonomic Regulation ◽

Deep Breathing ◽

Takotsubo Syndrome ◽

Orthostatic Test ◽

Rate Regulation ◽

Heart Rate Regulation ◽

Deep Breathing Test

Abstract Funding Acknowledgements Type of funding sources: None. Main funding source(s): North-Western State Medical University named after I.I. Mechnikov Objective to study the features of autonomic regulation of sinus rhythm features of autonomic regulation of cardiac sinus rhythm in patients with Takotsubo syndrome (TTS) during inpatient stay in hospital. Materials and methods. The study included 25 female patients (the median age 57.5 ± 28.5 years) with TTS, diagnosis was based on the InterTAK criteria. On the 5-7th day after admission, the heart rate variability (HRV) was assessed both at rest and cardiac autonomic function tests: the deep breathing test (DBT) and active orthostatic test (AOT) with the usage of a computer diagnostic system «Valenta». RESULTS According to HRV data, initially at rest, the majority of the studied patients predominantly had a parasympathetic impact on the heart rate regulation: in 70% - increased parasympathetic influence, in 17% - increased sympathetic influence, in 13% - a balanced heart rate regulation. When performing a DBT, the predominance of the parasympathetic influence on the heart rate was noted both in spectral parameters and according to the data of time analysis (HF during DBT increased 1.8 times up to 489.6 ± 114.2 ms2 (p <0.05) ; LF decreased 1.7 times up to 254.1 ± 70.3 ms2 (p <0.05); VLF increased 2.8 times up to 402.3 ± 101.8 ms2 (p <0, 05); TP increased 1.4 times up to 1145.9 ± 251.3 ms2; CV increased 1.3 times up to 6.5 ± 0.7% (p <0.05); SDNN increased 1.3 times up to - 58.7 ± 6.6 ms (p <0.05). HRV measured during an AOT showed a paradoxical evaluation in the parasympathetic impact on the heart rate (HF increased by 1.8 times and reached - 488.0 ± 104.7 ms2 (p <0.05); LF decreased by 1.1 times up to 408 , 4 ± 103.6 ms2; VLF increased 1.2 times up to 166.4 ± 52.2 ms2; TP increased 1.3 times up to 1062.8 ± 181.1 ms2 (p <0.05); CV increased 1.6 times up to 8.0 ± 0.9% (p <0.05); SDNN increased 1.4 times up to 62.6 ± 7.5 ms (p <0.05)). Conclusions During the index hospital inpatient stays the majority of patients with TTS have a vegetative imbalance due to increased parasympathetic influence on the heart rate, both at rest and during a deep breathing test and an active orthostatic test. This fact is quite unexpected and requires further study.

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