Stratification of the Mortality Risk According to Heart Rate and Systolic Blood Pressure in Heart Failure Patients

2012 ◽  
Vol 18 (10) ◽  
pp. S165-S166
Author(s):  
Masanobu Miura ◽  
Yasuhiko Sakata ◽  
Kotaro Nochioka ◽  
Tsuyoshi Takada ◽  
Satoshi Miyata ◽  
...  
2007 ◽  
Vol 30 (6) ◽  
pp. 282-287 ◽  
Author(s):  
Juan M. Aranda ◽  
Stephen E. McIntyre ◽  
Charles T. Klodell ◽  
Kaki M. York ◽  
Carl A. Dragstedt ◽  
...  

1997 ◽  
Vol 92 (6) ◽  
pp. 543-550 ◽  
Author(s):  
Gary C. Butler ◽  
Shin-Ichi Ando ◽  
John S. Floras

1. There is a substantial non-harmonic or fractal component to the variability of both heart rate and blood pressure in normal subjects. Heart rate is the more complex of these two signals, with respect to the slope, β, of the 1/fβ relationship. In congestive heart failure, heart rate spectral power is attenuated, but the fractal and harmonic components of heart rate and systolic blood pressure variability have not been characterized. 2. Two groups, each comprising 20 men, were studied during 15 min of supine rest and spontaneous respiration: one with functional class II—IV heart failure (age 52 ± 2 years; mean ± SEM) and a second group of healthy men (age 46 ± 2 years). 3. Total spectral power for heart rate was significantly reduced in heart failure (P < 0.02), whereas total spectral power for systolic blood pressure was similar in the two groups. In both heart failure and normal subjects, 65–80% of total spectral power in these two signals displayed fractal characteristics. 4. In heart failure, the slope of the 1/fβ relationship for heart rate was significantly steeper than in normal subjects (1.40 ± 0.08 compared with 1.14 ± 0.05; P < 0.05), indicating reduced complexity of the fractal component of heart rate variability. There was no significant difference in the 1/fβ slope for systolic blood pressure variability between these two groups, but the blood pressure signals were less complex than heart rate variations in both heart failure (2.31 ± 0.15; P < 0.006) and normal subjects (2.47 ± 0.15; P < 0.0001). 5. Parasympathetic nervous system activity, as estimated from heart rate variability was reduced (P < 0.01) in patients with heart failure, whereas trends towards increased sympathetic nervous system activity and decreased non-harmonic power were not significant. 6. The non-harmonic components of cardiac frequency are reduced in heart failure. Non-harmonic power is not attenuated, but the complexity of the heart rate signal is less than in subjects with normal ventricular function. A reduction in parasympathetic modulation appears to contribute to this loss of complexity of heart rate. Consequently, the heart rate signal comes to resemble that of blood pressure. In contrast, the variability and complexity of the systolic blood pressure signal is similar in heart failure and normal subjects. This reduced complexity of heart rate variability may have adverse implications for patients with heart failure.


2017 ◽  
pp. 81-88
Author(s):  
Ahmad Handayani ◽  
Kartika Kaban ◽  
Marwan Nasri ◽  
Zulfikri Mukhtar ◽  
Abdullah Afif Siregar

Background: Identification of Non-ST Elevation Myocardial Infarction (NSTEMI) patientsat higher risk of in-hospital complications is very important. Such identification will givecrucial information in determining treatment strategy especially for those come with heartfailure. One of the simple predictor for short term prognosis in acute coronary syndromeis shock index (SI), which is the ratio of heart rate over systolic blood pressure on admission.There had not been any study conducted to evaluate the use of SI in NSTEMI patientscome with heart failure. The aim of this study is to evaluate the SI compared with otherroutine clinical and laboratory examination as a predictor of in-hospital major adversecardiac events (MACEs) in NSTEMI patients presenting with heart failure.Methods: We performed a retrospective analysis of NSTEMI patients with heart failureadmitted to Haji Adam Malik General Hospital in Medan from January 2014 until July 2015.SI was calculated as the ratio of heart rate over systolic blood pressure on presentation.Patients presenting with cardiogenic shock were excluded.Results: There were 55 patients eligible in this study. In-hospital MACEs was found in 24patients (44%) compared with 31 patients (56%) without in-hospital MACEs. Patientswith in-hospital MACEs were older (60.6±10.8 vs. 57.2±7.9, p=0.178), had less historyof dyslipidemia [8(33%) vs. 19 (61%), p=0.032], faster heart rate (111.4±35.8 vs.96.5±24.3, p=0.032], higher GRACE score [139(98-187) vs. 120 (91-148); p=0.001],and higher SI [0.83(0.57-1.5) vs. 0.67 (0.38-1.27), p=0.013). SI >0.8 was the only independentpredictor of MACEs in NSTEMI patients presenting with heart failure (OR=4.3,CI=1.247-14.328, p=0.048).Conclusion: Beyond other routine examinations, SI is the only independent predictor ofin-hospital MACEs in NSTEMI patients presenting with heart failure.


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