|Year : 2022 | Volume
| Issue : 6 | Page : 270-273
Immediate effects of Pranayama on the cardiovascular parameters in hypertensive patients: A review
Shivani Batra1, Rameswar Pal2
1 Morarji Desai National Institute of Yoga, Ministry of Ayush, Government of India, New Delhi, India
2 Department of Human Physiology, Morarji Desai National Institute of Yoga, Ministry of Ayush, Government of India, New Delhi, India
|Date of Submission||08-Jul-2022|
|Date of Decision||08-Oct-2022|
|Date of Acceptance||14-Nov-2022|
|Date of Web Publication||29-Dec-2022|
Dr. Rameswar Pal
Department of Human Physiology, Morarji Desai National Institute of Yoga, Ministry of Ayush, Government of India, 68, Ashok Road, New Delhi - 110 001
Source of Support: None, Conflict of Interest: None
Many clinical trials and studies have already been conducted and published to find out the effects of yogic practice as well as pranayama on cardiovascular system of hypertensive patients. Many studies also conducted to find out the immediate effects of yogic practice on hypertensive patients. However, a review is rarely been published to find out the immediate effects of pranayama on hypertensive patients. Searching was made through PubMed, Google Scholar, PsychINFO and Scopus using the keywords pranayama and hypertension. A total of seven studies were selected for this review from a 17 articles. Patients of essential hypertension performed different pranayama and showed a result of a significant decrease in various cardiovascular parameters such as heart rate (HR) and blood pressure (BP). It may be concluded that pranayama practice immediately reduce BP and HR.
Keywords: Hypertension, pranayama, yoga
|How to cite this article:|
Batra S, Pal R. Immediate effects of Pranayama on the cardiovascular parameters in hypertensive patients: A review. Curr Med Res Pract 2022;12:270-3
| Introduction|| |
The word yoga is derived from the Sanskrit word 'yuj' which means 'to unite or to integrate'. It is all about harmonising the body, mind and breath through the means of various breathing exercises, yoga poses and meditation. As per the yogic scriptures, the practice of yoga leads to the union of individual consciousness with universal consciousness, indicating a perfect harmony between mind and body and man and nature. Yoga is the path as well as the aim of human life. Maharshi Patanjali, Father of Yoga, systematically compiled various aspects of yoga. According to philosophy, 'yogas chitta vritti nirodha refers to experience ultimate reality and self-realisation. He has described Astanga yoga for each and every population, and it may be common people, saints, sagas or very active peoples. According to his philosophy, yoga has eight limbs yama (abstinences), niyama (observances), asana (yoga postures), pranayama (breath control), pratyahara (withdrawal of the senses), dharana (concentration), dhyana (meditation) and samadhi (absorption). The first two limbs depict the precautions to be taken during the practice of yoga. Third limb asana strengthens muscles and prepares the body for long-time sitting. The fourth limb is pranayama. After attaining maturity in pranayama, practitioner goes towards Antaranga yoga (Dharana, Dhyana and Samadhi). It is also described that the first five limbs are Bahirang yoga and the last three are Antarang yoga.,
Hypertension is one of the most common health disorders. It is persistent high blood pressure (BP). It is one of the major risk factors for various diseases such as stroke, coronary artery disease and organ failure. Lifestyle modification plays a major role in the management and prevention of hypertension. Yoga is an effective adjunct therapy for hypertension. Yoga includes asana, pranayama, meditation, relaxation, dietary changes and other techniques that have been shown to aid in reducing cardiovascular risk and high BP. Breathing techniques are increasingly being used for therapeutic purposes, and research suggests that pranayama may be especially helpful in reducing BP. Pranayama is an integral component of holistic yoga therapy schedule and involves slowing down the normal breathing rate along with an awareness based, conscious inner focus on respiration. Pranayama attempts to address the root cause of the problem rather than merely providing a symptomatic relief. Many research studies have already been published that pranayama have the immediate effects on cardiovascular system. However, a review is rarely been published to find out the impacts of immediate effects of pranayama on hypertensive patients.
| Materials and Methods|| |
In view of the above context, extensive searches were made through PubMed and Google Scholar, to find out the immediate effects of pranayama on hypertensive patients. Each of these databases was searched using the keywords 'pranayama and hypertension' where full article was available and were downloading from that site. For inclusion in this review, studies which are written in English, which were find out the immediate effect of pranayama on hypertensive patients were selected. Exclusion criteria for the review, review articles, meta-analysis, retrospective studies and which were not concerning the immediate effect of pranayama on hypertensive patients.
| Data Abstraction|| |
Using the above-mentioned technique, 17 studies were identified and considered for initial evaluation. Among the 17 articles, six were removed because they were not considering the immediate effect of the pranayama. Among 11, four studies were excluded because they were not done on hypertensive patients. A total of seven studies met the criteria for final review.,,,7,,,, [Figure 1] shows the data abstraction details.
| Results|| |
[Table 1] shows detailed results. The search yielded a total of 17 trials of which seven met criteria for initial review. In three, there was Bhramari pranayama (humming breathing), one includes sheethali and sheekari pranayama, one include pranav pranayama and another include Chandra Nadi pranayama. All these were on hypertensive patients of different age group. Results showed that Bhramari pranayama reduced systolic, diastolic BP and heart rate (HR) immediately following practice. A study also reported that Bhramari pranayama immediately balance autonomic nervous system and participants goes towards parasympatho-dominance as low-frequency band of HR variability (HRV) decreases and high-frequency band of HRV increases. A study reported sheethali and Sheetkari pranayama decreases all component of BP, index of load in the heart (double product [DoP]) and index of myocardial oxygen consumption (rate-pressure product [RPP]). Chandranadi pranayama also decreased all component of BP. Suryanadi pranayama decreased all component of BP except diastolic BP. A study showed that pranav pranayama and shukh pranayama decreased all components of BP.,
| Discussion|| |
The aim of this review article was to study the immediate effect of pranayama on cardiovascular parameters in patients of hypertension. From the studies, it is found that pranayama has significant effect on different cardiovascular parameters immediately after the practice of pranayama. The pranayama practices are effective in reducing HR and BP at significant rates in hypertensive patients. This might be due to balancing of autonomic function as well as improve cardiovascular rhythms as a result of increased vagal modulation and/or decreased sympathetic activity and improved baroreflex sensitivity. Such as Bhranmari pranayama increased high frequency of HRV and decreased low frequency of HRV. It indicates the balance of the autonomic nervous system and practitioner goes towards parasympatho-dominance. Controlled slow breathing may modify neural respiratory elements and it lead towards parasympatho-dominance. Parasympatho-dominance may decrease BP and HR immediately. A study includes HRV suggest this fact.
Controlled breathing in different pranayamas may increase intrathoracic pressure. This may lead to more blood flow to the heart and it subsequently increases the stroke volume. Accordingly, it may increase cardiac output. It may also a possible reason for reduction of BP. A study demonstrated that pranayama increases the production and release of nitric oxide. Nitric oxide may help to dilate the blood vessels. Dilatation of the blood vessels may lead to decrease BP. Previous studies describe long-term yogic practices reduced BP.,
Another possible mechanism to decrease BP may be the reduction of stress. Pranayama plays a major role in the reduction of stress through hypothalamo–pituitary–adrenal axis. Previous studies are also proved this fact. Pranayama practices also reduce oxygen consumption, which may lead to decrease demand, transport and supply of oxygen. It may be another cause for the reduction of BP.
RPP and DoP reduced significantly immediate after pranayama practice. This may be due to decrease myocardial oxygen consumption and load in the heart. Yogic practice may lower the strain in the heart. Previous studies also suggest this fact.,
These findings have potential therapeutic applications in day-to-day as well as clinical situation where BP needs to be brought down at the earliest. These simple and cost-effective techniques may add to the management protocol of hypertension in addition to regular medical management.
| Conclusion|| |
It may be concluded that different pranayamas has the major role to control the BP immediately in essential hypertensive patients. It may also reduce the load in the heart and myocardial oxygen consumption. Some studies also reported that SpO2 may immediately increase following pranayama practice.
This review, however, has identified only study involving hypertensive patients and it also does not include secondary hypertensive condition. Although some probable mechanism has been discussed, a single experimental study has not been conducted to find out the mechanism.
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Conflicts of interest
There are no conflicts of interest.
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