جستجوی مقالات مرتبط با کلیدواژه « Heart Rate » در نشریات گروه « پزشکی »

High-tempo music is commonly used during exercise to enhance physical activity. Post-exercise parasympathetic reactivation, responsible for cardiac recovery, is crucial for predicting cardiac arrhythmia and overall heart health. Previous studies have demonstrated positive effects of music on exercise performance in healthy individuals. However, little is known about its impact on diabetic (Type II) females and young adults. Therefore, we aimed to investigate the effect of listening to high-tempo music during exercise on workout performance and parasympathetic reactivation in these populations.

We evaluated a total of 70 females, including healthy individuals (n=36) and diabetic (Type II) females (n=34). Prior to the experiment, lipid profile and cardiac risk ratio were measured in blood samples taken one week before the active sessions. Each participant underwent two separate active sessions: one session involved running without music, and the other involved running while listening to music for a duration of 6 minutes. Heart rate was measured before running and at zero, five, and ten minutes after exercise. Running distance was also recorded.

In healthy adults, running distance significantly increased when listening to music during exercise compared to the non-music session (P<0.0001). Additionally, heart rate was significantly higher at time zero during running with music compared to the non-music session (P<0.0001). However, heart rate recovery was superior 10 minutes after exercise in the music group compared to the non-music group in diabetic females (P<0.0001).

 Listening to high-tempo music during exercise may increase sympathetic activity and enhance exercise performance, particularly in healthy young adults. Interestingly, listening to music during exercise may accelerate parasympathetic reactivation to a greater extent in diabetic females, potentially reducing the risk of arrhythmias during the resting period without enhancing exercise performance

Background &  The presence of anesthetic drugs in the serum with possible negative effects on FSH and LH hormone concentration and vital signs has been shown in a number of experimental and human research.To measure the effects on blood hormone concentration and the effect on the vital signs (blood pressure and heart rate) of two different medications (remifentanil vs. fentanyl) used for general anesthesia during oocyte retrieval.Materials &  The present prospective comparative study was carried out at Iraq's "High Institute of Infertility Diagnosis and Assisted Reproductive Technologies/Reproductive Physiology/Al-Nahrain University/Baghdad/Iraq" infertility center with the approval of the Faculty of Science's ethical committee. Mansoura University approved the study's validity. Ninety infertile women who are undergoing intracytoplasmic sperm injections (ICSI) for a variety of infertility-related reasons. The women ranged in age from 25 to 45. The study's original December 2022 deadline was pushed out to December 2023. Patients were split into two groups based on the general anesthesia technique for oocyte retrieval. Group one (45 patients) received midazolam, propofol, and fentanyl; group two (45 patients) received remifentanil, midazolam, and propofol. We compared the FSH and LH hormone levels before and after anesthesia and also compared the effect of anesthesia on vital signs between two groups of patients before and after anesthesia; accordingly, there was significantly higher systolic blood pressure in remifentanil group (p=0.30); however, there were no significant differences in diastolic blood pressure (p=0.767) and heart rates (p=0.512). The associations of LH and FSH with anesthesia are different depending on the type of anesthetic drugs.

Previous studies on heart response rate (HRR) were conducted in diabetic patients. This study aims to evaluate HRR in end-stage renal disease (ESRD) patients and its correlation with myocardial perfusion imaging (MPI) findings and patients’ prognosis.

The present study was conducted on patients with chronic kidney disease (CKD) who visited Shahid Hasheminejad Hospital between October 1, 2011, and September 30, 2019. Before the stress test, the patient was asked to rest in a supine position for 3 minutes while an electrocardiogram, blood pressure, and heart rate were recorded. Dipyridamole was then administered as an infusion with a dose of approximately 0.56 mg/kg of the patient’s monitoring of the electrocardiogram. The patient’s heart rate was recorded at 2-minute intervals after the start of the dipyridamole injection. Three minutes after the completion of the dipyridamole injection, radiopharmaceutical was injected. Finally, the findings of the myocardial perfusion scan were analyzed.

The summed stress score (SSS), and summed rest score (SRS) had a significant relationship with the female gender and ejection fraction (EF) with the male gender (P<0.05). These results were not significantly related to patients’ age and disease history (P>0.05). No significant difference was observed in the incidence of blunted HRR in patients with cardiac events by age, gender, and renal disease condition (P>0.05).

The frequency of blunted HRR in patients with CKD based on various variables was determined for the first time in the country in the present study, which can be an introduction for future research.

In this article, a patient monitoring system is proposed that is able to obtain heart rate and oxygen saturation (SpO2) levels of patients, identify abnormal conditions, and inform emergency status to the nurses. The proposed monitoring system consists of smart patient wristbands, smart nurse wristbands, central monitoring user interface (UI) software, and a wireless communication network. In the proposed monitoring system, a unique smart wristband is dedicated to each of the patients and nurses. To measure heart rate and SpO2 level, a pulse oximeter sensor is used in the patient wristbands. The output of this sensor is transferred to the wristband’s microcontroller where heart rate and SpO2 are calculated through advanced signal processing algorithms. Then, the calculated values are transmitted to central UI software through a wireless network. In the UI software, received values are compared with their normal values and a predefined message is sent to the nurses’ wristband if an abnormal condition is identified. Whenever this message is received by a nurse’s wristband, an acoustic alarm with vibration is generated to inform an emergency status to the nurse. By doing so, health services are delivered to the patients more quickly and as a result, the probability of the patient recovery is increased effectively.

Most of the people with Down syndrome have short stature compared to general population. There is also a high prevalence of overweight and obesity, mainly in the adolescence and in the adult life. The aim of this study was to compare some anthropometric parameters, heart rate and blood pressure of children with Down syndrome and those with normal development. Down syndrome is among the most commonly classified categories of mental sub normality, with the incidence at birth being around 1: 700 and 1: 750 in live births in most countries worldwide, with the risk of increasing with mother’s age.

The sample consisted of 82 children, 32 with Down syndrome and 50 healthy children, male, aged 14-15 yr from the population of Kosovo in 2022. There were no health problems present in the healthy children.

About 53% of children with Down syndrome have normal body mass, 15.62% are overweight, and 21.8 are obese. In terms of blood pressure, Down syndrome children have higher systolic pressure (121.94mm/hg), sd ±21.69 than healthy children (111.18mm/hg, sd ±10.88).

Children with Down syndrome had significantly higher body mass index, heart rate, and systolic pressure at rest compared to healthy children. However, after short physical activity, healthy children exhibited greater diastolic pressure than children with Down syndrome.

The flexibility of the heart is important for cardiovascular health. The heart rate variation (HRV) is a metric of heart flexibility. Muslims perform praying (Namaz) which has some significant effects on general health regularity. The study aimed to assess the impact of real Namaz on HRV.

Eighty-two participants who performed Namaz daily were categorized into three groups, including more minor, more than, and equal to the normal cortisol level range based on salivary cortisol. The electrocardiography was recorded before, during (divided into standing, bowing, prostration, and sitting positions), and after a four-cycle Namaz around noon. The linear and non-linear features of HRV were extracted.

The two-way analysis of variance showed that the standard deviation (SD)1 and SD2 of the Poincare plots of all groups increased after Namaz (P<0.0001). During Namaz, the indexes of sympathetic tone decreased in the prostration and bowing compared to the sitting and standing positions (P<0.00001). The SD of the mean of the R peaks interval, SD1, and SD2 of the Poincare plot also increased in those comparisons (P<0.00001). In addition, the spectral entropy was decreased in the bowing and prostration compared with standing and sitting positions (P<0.001).

Namaz significantly increased the performance of the cardiovascular system and decreased the effect of daily stress on it.

High levels of resistin are associated with metabolic diseases and their complications, including hypertension. The paraventricular nucleus (PVN) is also involved in metabolic disorders and cardiovascular diseases, such as hypertension. Therefore, this study aimed to study cardiovascular (CV) responses evoked by the injection of resistin into the lateral ventricle (LV) and PVN and determine the mechanism of these responses in the rostral ventrolateral medulla (RVLM).

Arterial pressure (AP) and heart rate (HR) were evaluated in urethane-anesthetized male rats (1.4 g/kg intraperitoneally) before and after all injections. This study was carried out in two stages. Resistin was injected into LV at the first stage, and AP and HR were evaluated. After that, the paraventricular, supraoptic, and dorsomedial nuclei of the hypothalamus were chosen to evaluate the gene expression of c-Fos. Afterward, resistin was injected into PVN, and cardiovascular responses were monitored. Then to detect possible neural mechanisms of resistin action, agonists or antagonists of glutamatergic, GABAergic, cholinergic, and aminergic transmissions were injected into RVLM. 

Resistin injection into LV or PVN could increase AP and HR compared to the control group and before injection. Resistin injection into LV also increases the activity of RVLM, paraventricular, supraoptic, and dorsomedial areas. Moreover, the CV reflex created by the administration of resistin in PVN is probably mediated by glutamatergic transmission within RVLM. 

It can be concluded that hypothalamic nuclei, including paraventricular, are important central areas for resistin actions, and glutamatergic transmission in RVLM may be one of the therapeutic targets for high AP in obese people or with metabolic syndrome.

A resting heart rate may be correlated with an increased risk of stroke. Therefore, we explored the independent and joint influences of heart rate and body mass index on the incidence of stroke and its sub-types in a Chinese rural population.

Cox proportional hazard models were adopted for measuring the influence exerted by heart rate on stroke in the Tongxiang China Kadoorie Biobank prospective cohort analyses, in which 23,132 men and 32,872 women were included. Incident stroke refers to ‘24-hour acute focal disorder, considered to result from ische-mia or intracranial hemorrhage’.

Over a 6.9 year mean follow up period, 986 men and 925 women developed stroke, representing an incidence of 6.35 and 4.00 per 1,000 person-years. In contrast to men with heart rate < 69 beats/minute, men at heart rate ≥ 90 beats/minute could more probably develop stroke and ischemic stroke with representing hazard ratio [95% confidence interval (CI)] 1.29 (1.05 – 1.58), and 1.35 (1.06 – 1.71). An adjusted hazard ratio of 1.37 (95% CI = 1.06 - 1.74) and 1.46 (95% CI = 1.08 – 1.96) were respectively identified for stroke and is-chemic stroke in non-overweight/obese male patients with heart rate ≥ 90 beats/minute. Joint analyses also favored the results. Unfortunately, non-significant results were found in women.

Higher resting heart rate acts as an independent predictor of any stroke and ischemic stroke risk in adult Chinese male but not in female. This relationship was particularly evident among non-overweight/obese male participants.

Autonomous Sensory Meridian Response is a novel phenomenon that is very popular these days on Youtube and Reddit to its anti-anxiety effects. As the name suggests, ASMR is a relaxing warm sensation that begins on the scalp and spreads throughout the body. This technique is also known as "brain massage," and it relies on soothing sights and sounds, like whispers and slow movements.One of the most substantial reasons for investigating these videos is to find out their scientific roots, which can be from different approaches. In this paper, we intended to examine the physiological changes such as Heart Rate (HR) as well as Galvanic Skin Conductance (GSC) levels before and after watching a single session ASMR video. The dependent t-test statistical analysis by SPSS results with P-value <=0.01 indicated that after a single session of ASMR watching, the heart rate decreased significantly comparing the baseline data. In addition, the skin conductance was slightly reduced as well, but not significantly. These physiological findings prove that ASMR could be an affordable, portable, and immediate anxiety relief for those struggling with anxiety-based disorders, especially for patients who do not respond well to medication or seek alternatives to anti-anxiety medications due to the wide range of side effects or would like to try it for better results along with the prescribed drugs.

Due to the presence of the cholinergic system in the lateral periaqueductal gray (lPAG) column, the cardiovascular effects of Acetylcholine (ACH) and its receptors in normotensive and hydralazine (HYD) hypotensive rats in this area were evaluated.

After anesthesia, the femoral artery was cannulated and systolic blood pressure (SBP), mean arterial pressure (MAP), heart rate (HR), and also electrocardiogram for evaluation of low frequency (LF) and high frequency (HF) bands, important components of heart rate variability (HRV), were recorded. ACH, atropine (Atr, a muscarinic antagonist), and hexamethonium (Hex, an antagonist nicotinic) alone and together microinjected into lPAG, changes (Δ) of cardiovascular responses and normalized (n) LF, HF, and LF/HF ratio were analyzed.

In normotensive rats, ACH decreased SBP and MAP, and enhanced HR while Atr and Hex did had no effects. In co-injection of Atr and Hex with ACH, only ACH+Atr significantly attenuated parameters. In HYD hypotension, ACH had no affect but Atr and Hex significantly improved the hypotensive effect. Co-injection of Atr and Hex with ACH decreased the hypotensive effect but the effect of Atr+ACH was higher. In normotensive rats, ACH decreased nLF, nHF, and nLF/nHF ratio. These parameters in the Atr +ACH group were significantly higher than in ACH group. In HYD hypotension nLF and nLF/nHF ratio increased which was attenuated by ACH. Also, Atr+ACH decreased nLF and nLF/nHF ratio and increased nHF.

The cholinergic system of lPAG mainly via muscarinic receptors has an inhibitory effect on the cardiovascular system. Based on HRV assessment, peripheral cardiovascular effects are mostly mediated by the parasympathetic system.

Infants undergo extremely painful procedures in a Neonatal Intensive Care Unit (NICU), which if left uncontrolled may cause complications. Therefore, this study was conducted to investigate gentle touch effect on cardiorespiratory indices and pain behaviors related to venipuncture and blood sampling in preterm infants.

A quasi‑experimental study was undertaken in gentle touch and control groups in three stages. The population included premature infants in NICU of Al‑Zahra Hospital, Isfahan, Iran. Using convenience sampling, 52 infants were randomly selected and assigned to two groups (n = 26). Gentle touch technique and measurement of cardiorespiratory indices were performed 5 minutes before, during, and 5 minutes after procedure, and routine care was provided for control group. Neonatal pain and cardiorespiratory indices were assessed using the Neonatal Infant Pain Scale (NIPS) and an intensive care monitor. Data was analyzed using repeated measures ANOVA, independent t‑test, and Chi‑square test in SPSS software.

The independent t‑test revealed a significant difference between mean pain score of the infants in two groups during the procedures (t50 = ‑3.32, p </em>= 0.002), but no significant different was between groups before and after the procedure (p > 0.05). However, the cardiorespiratory indices were not significantly different before, during, and after the procedure (p > 0.05).

The results suggest that gentle touch reduced the infants’ pain during venipuncture and blood sampling. Thus, it is recommended this method be applied to mitigate pain in premature infants.

Physical fitness refers to the ability of the body to perform tasks or do one of the physical activities well without being tired quickly. The objective of this research is to develop a physical fitness instrument for measuring oneself heart rate, grip strength, and reaction time that could develop a model for a self‑check‑up on physical fitness which helps to plan the improvement for health which is called the “FIBER‑FIT” model.

The physical fitness measuring instrument is composed of three modules; (1) heart rate meter module using a green light emitting diode and a photosensor, (2) grip strength meter module using a load cell transducer, and (3) reaction time meter module using a computer graphical function. All modules are controlled by computer programming, LabVIEW. The program could measure the physical fitness parameters in real‑time and display the results in graphs, values on a computer monitor. The data could be recorded on cloud storage and could be retrieved for viewing and analyzing from anywhere via the internet.

Getting the “FIBER‑FIT” model, a physical fitness measuring instrument to evaluate and analyze the results in real time. Overall performance test results were comparable to the standard commonly used instruments. The satisfaction survey scores from the participants were 33.33% and 66.67% for the highest level and the high level, respectively.

The Cloud “FIBER‑FIT” model is recommended for physical fitness applications for health improvement.

Heart rate variability (HRV) is calculated by electrocardiography (ECG-HRV) or blood pressure (BP-HRV). The purpose of this study was to determine the validity of the above methods in rats with normal and ischemic hearts during the baroreflex maneuver.

The study was conducted at Shiraz University of Medical Sciences, Shiraz, Iran, in 2021. Sprague-Dawley rats were divided into a sham group and an isoproterenol-mediated cardiac ischemia (ISO) group. Saline and isoproterenol (150 mg/kg) injected subcutaneously for 2 consecutive days in the sham and ISO groups, respectively. Then, the animals were anesthetized with an intraperitoneal injection of sodium thiopental (60 mg/kg), and the femoral artery and vein were cannulated. Baroreflex was activated using an intravenous injection of phenylephrine (10 µg/100 µL saline). ECG, BP, and heart rate (HR) were recorded, and the time domain of HRV and baroreflex gain were calculated.

Baroreflex gain in the ISO group (male, weight=275.8±2.8 g, n=8) was lower than that in the sham group (male, weight=258±2.3 g, n=8) (P<0.05). ECG-HRV indicated an increase in the standard deviation of the RR interval (SDRR), the index of overall HRV, and the parasympathetic index of the root mean square of successive differences (RMSSD) in both groups. However, the rise in SDRR and RMSSD in the ISO group was less than that in the sham group (P<0.05). SDRR and RMSSD obtained from BP did not show a difference between the sham and ISO groups, nor did they correspond with the results seen in baroreflex gain.

BP-HRV was not as valuable as ECG-HRV in assessing cardiac ischemia.

Anxiety disorders are among the most common mental health concerns in people’s lifestyles. There are many traditional psychological methods to manage anxiety. Heart rate is the most relevant biomarker of the autonomic nervous system among the various physiological markers. Hence, the increase in the heart rate is associated with a wide range of negative psychological events.

In this study, a wearable device called a "smart bracelet" was developed and tested to make mechanical oscillations similar to normal people’s heart rates, and then the effect of it was evaluated among taekwondo athletes wearing this device before the matches.

In order to evaluate the results, the heart rate was measured five minutes before the competition, with an average of 81 bpm in the group using the bracelet and 84.42 bpm in the group without the bracelet. The average heart rate in the group with the bracelet was 78.5, and without a bracelet was 92.14 bpm.

The results of this study showed that wearable technology inducing mechanical waves is similar to normal people’s heartbeat through the radial nerve, which reduces stress significantly and can prevent an increase in stress.