Ageing and the cardiovascular system

Summary Heart disease is the most common cause of death in elderly people. Cardiovascular aging is a continuous and irreversible process. It has a decline rate that varies among individuals and can be modulated by three conceptually different influences, namely, physiological changes due to the passage of time, adaptive sequeles of previous diseases or surgery in younger life, and influence of the individual lifestyle or their own cardiovascular risk factors. The main practical consequences of aging processes are a progressive change in the morphological, functional, and semiological characteristics of the cardiovascular system and an increase in the number of age-related cardiovascular disorders. The main morphological cardiovascular changes with aging happen in the structure of cardiac tissue and chambers, in the conduction system, and in the coronary arteries. But the cardiac function at rest in healthy elderly persons is adequate to meet the body's need. A normal or almost normal cardiac output in the elderly is to be maintained by increasing the stroke volume and the ejection fraction due to an augmented cardiac filling (preload). Atypical clinical pictures are very common in elderly patients with cardiovascular disease. For example, non-cardiac symptoms are the often presenting features. Concerning the treatment of cardiovascular diseases in the elderly, the clinician needs to consider age-related factors as multimorbidity and disabilities, the possible side effects and/or interactions due to pharmacodynamic or/and pharmacocinetic changes. And he has to take into account the social and financial situation of his patient. Received: 5 July 1999, Accepted: 4 August 1999     

Basic mechanisms of the aging gastrointestinal tract

The goal of this short review is to summarize recent data on gastrointestinal changes with aging, focusing on gastrointestinal motility disorders, and mucosal variations. First of all, this review focused on gastrointestinal motility disorders with aging, even though an increased prevalence of several gastrointestinal motor disorders (i.e., dysphagia, dyspepsia, anorexia, and constipation) occurs in older people, aging per se appears to have a minor direct effect on most gastrointestinal functions. Secondly, this review focused on histological changes with aging, i.e., regulation of gastrointestinal mucosal growth, gastrointestinal carcinogenesis, and gastric mucosal changes, especially changes in gastric acid secretion, bacterial overgrowth and its consequences on elderly patients.     

Age related changes in gut physiology and nutritional status.

Few gastrointestinal functions decline to an important extent as a result of old age alone and there is little clinical evidence that significant malnutrition occurs in any normal elderly person as a result of the aging process itself. Nevertheless, decreased gastrointestinal reserve makes older people highly sensitive to minor insults and decompensation can rapidly occur. Drugs appreciably affect taste sensation, which is already blunted and psychological as well as physical disability can have a major impact on appetite. Malabsorption can be caused by gastric hypochlorhydria with small bowel bacterial overgrowth and while gastrointestinal dysmotility can be caused by subclinical hypothyroidism, it can improve in response to physical exercise. Evidence is now mounting that thorough investigation of gastrointestinal disturbances in elderly patients coupled with intensive nutritional support can make a very real impact on their outcome. Gastroenterologists should therefore seek out and actively treat gastrointestinal disorders in the elderly and not just ascribe them to old age.     

中枢神经调节剂在老年功能性胃肠病中的应用现状

功能性胃肠病是一组根据胃肠道症状分类的疾病,其症状产生主要与脑-肠轴功能异常、动力紊乱、内脏高敏感、黏膜和免疫功能的改变、肠道菌群的改变、中枢神经系统处理功能异常相关,在老年患者中发病率较高。单用常规药物治疗该病多难以缓解症状,辅以中枢神经调节剂则可明显改善症状。然而老年人多存在共病状态,因此在应用中枢神经调节剂时,应注意药物种类、剂量和药物间相互作用,避免毒副作用。本文主要对中枢神经调节剂在老年功能性胃肠病患者中对不同转运蛋白和受体的调节机制和作用、临床应用及副反应进行综述,以期对老年功能性胃肠病患者应用中枢神经调节剂提供参考依据。     

Gastrointestinal issues in the older female patient

As the body ages, it undergoes a multitude of changes. Some of these changes are visible, whereas others are not and may be elicited during the patient encounter. Some gastrointestinal issues may be more common in the elderly population and possibly in older women. These issues range from motility disorders, such as fecal incontinence and constipation, to changes in neuropeptide function and its effect on the anorexia of aging. This article comprehensively reviews gastrointestinal issues that commonly afflict the elderly female population.     

GI problems in the elderly, Part I: Aging-related considerations

Gastrointestinal problems are very common in the elderly; they account for 20% of all geriatric deaths. The evaluation of gastrointestinal ailments is difficult in the aged due to variation in signs and symptoms, coexisting nutritional problems, lack of patient cooperation, presence of comorbidity, and effects of polypharmacy. Poor clinical histories are common and gastrointestinal ailments may be atypical. Non-compliance with therapy and testing is a common problem and unrealistic expectations from interventions are the rule rather than the exception. Iatrogenic disorders must be ruled out in all patients with gastrointestinal symptoms; an accurate drug and nutritional history is critical for achieving success in the management of the elderly.     

Myopathies in the elderly

Muscle disease symptoms and myopathies are not uncommon in the elderly. Inflammatory and noninflammatory myopathies lead to proximal extremity or axial weakness and are superimposed on the intrinsic changes that occur in muscle with aging (sarcopenia). This article surveys the more common myopathies in the elderly based on a review of the process of sarcopenia, and how these age-related changes in muscle structure and function affect the results of the standard assessments of muscle disease in the elderly.     

Constipation and fecal incontinence in the elderly.

Although constipation and fecal incontinence are common symptoms in the elderly, relatively little research has been done to differentiate physiologic changes in rectoanal function resulting from aging and pathologic changes resulting from diseases occurring as patients age. Certain physiologic changes occur in many older patients and may predispose them to the development of constipation or fecal incontinence. These symptoms need the same thoughtful evaluation and management in the elderly as in younger patients. Results of therapy often can be good, leading to alleviation of suffering and the ability to lead a fuller life.     

Normal and abnormal aging of cardiovascular system

Studies of normal aging in the cardiovascular system in humans are affected by the study population. Besides intrinsic biological aging, extrinsic factors including overt or latent cardiovascular diseases as well as life style variables such as physical activity, diet, alcohol and smoking may influence the age-related changes of cardiovascular function. We have recruited "normal" elderly subjects from community-dwelling volunteers by extensive health screening procedures including treadmill maximum exercise tests. Some of their cardiovascular functions, such as various cardiovascular regulatory functions, were altered compared to normal young subjects, while others such as resting hemodynamics were not. Interrelationships among various autonomic functions in the elderly were not recognized. Although general effects of life styles on circulatory regulatory functions were not clearly indicated, variables such as sodium intake or body mass index appeared to affect some of the sympathetic nervous functions. Furthermore, hypertension in the elderly had much less impact on cardiovascular functions than is generally expected, based on the results from young or middle-aged subjects. To identify factors which either modify (accelerate) or do not affect the aging of the cardiovascular functions is important not only to achieve a good aging process but also to establish therapeutic goals in elderly subjects.     

Rationale to integrate comprehensive geriatric assessment for older olds presenting gastro-intestinal disorders

The prevalence of chronic gastrointestinal symptoms is underestimated. However, complaints consistent with functional gastrointestinal disorders are common in the elderly, but symptoms are a poor predictor of presentation for medical care. Moreover, chronic colonic symptoms appear to interfere with daily living and quality of life in the elderly. Clinicians are questioning about the diagnostic management of frail older adults presenting these common and non specific symptoms. This paper proposes a definition of the "geriatric patient" and gives an overview of recently published literature concerning the concept of comprehensive geriatric assessment. The rationale to integrate comprehensive geriatric assessment for older adults presenting gastro-intestinal disorders is pointed out.     

基于脑-肠轴学说探讨老年功能性消化不良患者睡眠障碍对焦虑抑郁和下消化道症状影响

背景功能性消化不良(functional dyspepsia,FD)是老年患者常见疾病之一,病情容易反复,严重影响患者身心健康.肠-脑互动异常是FD发病主要病因,大多伴有不同程度的睡眠障碍和焦虑、抑郁等负面心理.目前,对于老年FD患者与睡眠障碍和焦虑抑郁、下消化道症状的研究报道较少.目的基于脑-肠轴学说探讨观察老年FD患者睡眠障碍对焦虑抑郁和下消化道症状影响分析.方法选择2017-02/2019-09在我院就诊的236例老年FD患者为研究对象,课题负责人发放量表,对符合罗马Ⅳ标准的老年FD患者进行调查,评估其下消化道症状严重程度,睡眠质量和焦虑和抑郁评分变化情况.结果214例老年FD患者中存在睡眠障碍者103例(48.13%),存在焦虑、抑郁者182例(85.05%).有睡眠障碍老年FD患者的下腹痛发生率为35.92%,下腹不适(非疼痛)发生率为33.98%、羊粪样或硬便发生率为21.36%、用劲排便发生率为32.04%、排便不尽感发生率为43.69%和便急感的发生率为27.18%,均高于无睡眠障碍老年FD患者,差异比较均有统计学意义(P<0.05).有睡眠障碍的老年FD睡眠障碍患者焦虑自评量表评分为65.34分±7.29分,抑郁自评量表评分为66.17分±8.26分,均高于无睡眠障碍的老年FD患者(P<0.05).结论老年FD患者常同时存在睡眠障碍与焦虑、抑郁,睡眠障碍与老年FD患者的下消化道症状关系密切.     

Nutrition, cancer, and aging: an annotated review. II. Cancer cachexia and aging

The interactions of cancer and malnutrition are discussed with the focus on aging. To establish whether the elderly are more likely to develop cancer cachexia and its complications, this review encompasses the pathogenesis of malnutrition in cancer; the age-related alterations of appetite, gastrointestinal function, energy expenditure, and protein turnover; the diagnosis of malnutrition; and the effectiveness of nutritional support in the elderly. Although metabolic and physiologic changes induced by cancer and age appear synergistic in causing cachexia, more frequent complications of malnutrition have not been observed in the geriatric cancer patients. This may be due to only a small proportion of the elderly with cancer being enrolled in clinical studies or to a reduced cachexia-inducing ability of tumors in these patients. A limited number of studies indicate nutritional replenishment is obtainable in malnourished elderly by hyperalimentation. As restoration of the lean body mass may be slower in older patients, early institution of nutritional support is recommended in malnourished elderly or elderly at risk for malnutrition during neoplastic treatment.     

Serotonin: from top to bottom

Serotonin is a monoamine neurotransmitter, which is phylogenetically conserved in a wide range of species from nematodes to humans. In mammals, age-related changes in serotonin systems are known risk factors of age-related diseases, such as diabetes, faecal incontinence and cardiovascular diseases. A decline in serotonin function with aging would be consistent with observations of age-related changes in behaviours, such as sleep, sexual behaviour and mood all of which are linked to serotonergic function. Despite this little is known about serotonin in relation to aging. This review aims to give a comprehensive analysis of the distribution, function and interactions of serotonin in the brain; gastrointestinal tract; skeletal; vascular and immune systems. It also aims to demonstrate how the function of serotonin is linked to aging and disease pathology in these systems. The regulation of serotonin via microRNAs is also discussed, as are possible applications of serotonergic drugs in aging research and age-related diseases. Furthermore, this review demonstrates that serotonin is potentially involved in whole organism aging through its links with multiple organs, the immune system and microRNA regulation. Methods to investigate these links are discussed.     

Presbyesophagus: a reappraisal

The gastrointestinal tract undergoes change with aging, and the esophagus is not exempt from those changes. Failure of peristalsis in the older esophagus was labeled "presbyesophagus" over 35 years ago. Modern manometric techniques and classification systems have challenged this concept, yet there are clearly age-related changes in the esophagus. The lower esophageal sphincter changes little. Esophageal peristalsis (body) is more likely to fail in older patients, but some of this failure may be caused by damage from gastroesophageal reflux disease. The pharynx and upper esophageal sphincter also undergo age-related changes in health and disease. The ability to sense events in the esophagus fails with aging, which may cause patients with severe mucosal disease to present with less severe symptoms. Failure of the esophagus thus does not appear to be an inevitable consequence of aging, but the esophagues does undergo change with aging, and these changes should be considered in evaluation of older patients with esophageal complaints.     

Aging of the mammalian gastrointestinal tract: a complex organ system

Gastrointestinal disorders are a major cause of morbidity in the elderly population. The gastrointestinal tract is the most complex organ system; its diverse cells perform a range of functions essential to life, not only secretion, digestion, absorption and excretion, but also, very importantly, defence. The gastrointestinal tract acts not only as a barrier to harmful materials and pathogens but also contains the vast number of beneficial bacterial populations that make up the microbiota. Communication between the cells of the gastrointestinal tract and the central nervous and endocrine systems modifies behaviour; the organisms of the microbiota also contribute to this brain–gut–enteric microbiota axis. Age-related physiological changes in the gut are not only common, but also variable, and likely to be influenced by external factors as well as intrinsic aging of the cells involved. The cellular and molecular changes exhibited by the aging gut cells also vary. Aging intestinal smooth muscle cells exhibit a number of changes in the signalling pathways that regulate contraction. There is some evidence for age-associated degeneration of neurons and glia of the enteric nervous system, although enteric neuronal losses are likely not to be nearly as extensive as previously believed. Aging enteric neurons have been shown to exhibit a senescence-associated phenotype. Epithelial stem cells exhibit increased mitochondrial mutation in aging that affects their progeny in the mucosal epithelium. Changes to the microbiota and intestinal immune system during aging are likely to contribute to wider aging of the organism and are increasingly important areas of analysis. How changes of the different cell types of the gut during aging affect the numerous cellular interactions that are essential for normal gut functions will be important areas for future aging research.     

The aging hand

Hand function decreases with age in both men and women, especially after the age of 65 years. A review is presented of anatomical and physiological changes in the aging hand. The age-related changes in prehension patterns (grip and pinch strength) and hand dexterity in the elderly population are considered. Deterioration in hand function in the elderly population is, to a large degree, secondary to age-related degenerative changes in the musculoskeletal, vascular, and nervous systems. Deterioration of hand function in elderly adults is a combination of local structural changes (joints, muscle, tendon, bone, nerve and receptors, blood supply, skin, and fingernails) and more distant changes in neural control. These age-related changes are often accompanied by underlying pathological conditions (osteoporosis, osteoarthritis, rheumatic arthritis, and Parkinson's disease) that are common in the elderly population. Assessment of hand function and prehension patterns is needed in order to determine specific treatment approaches.     

Evaluation of pulmonary function in the elderly. Intergroupe Pneumo Gériatrie SPLF-SFGG

Aging is associated with a progressive decrease in lung function. As a consequence of aging, individual's reserve is diminished, but this decrease is heterogeneous between individual subjects. Many factors are involved in the overall decline in lung function. The prevalence of asthma in the elderly is estimated between 6 and 10%. Mortality due to COPD is increasing, especially among older subjects. Older subjects are at an increased risk of developing chronic diseases such as Parkinson's disease, which can have consequences for lung function. Under-nutrition is also common in the elderly and can produce sarcopenia and skeletal muscle dysfunction. The presentation of respiratory disorders may differ in the elderly, especially because of a lack of perception of symptoms such as dyspnea. The impact of bronchodilatators or corticosteroids on respiratory function has not been studied in the elderly. Drugs usually used for the treatment of hypertension or arrhythmias, which are often observed with aging, can have pulmonary toxicity. There is no difference between functional evaluation in younger and older subjects but it is more difficult to find predicted values for older patients. Performing pulmonary function tests in older patients is often difficult because of a higher prevalence of cognitive impairment and/or poor coordination. When assessing pulmonary function in the elderly, the choice of tests will be depend on the circumstances, with the use of voluntary manoeuvres dependent on the condition of the patient.     

Allergy and asthma in the elderly

Allergies and asthma are diseases that affect individuals of all ages, and their prevalence is comparable in all age groups. As age demographics in the United States and other countries shift to greater proportions and numbers of patients in the "elderly" categories, it is becoming increasingly important for clinicians to become aware of the impact of aging on a variety of diseases. Allergy and asthma are recognized as inflammatory disorders, and there are data demonstrating that age-related changes in immune function can have a significant impact on these disorders.     

Clinical manifestations, diagnostic assessment, and etiology of heart failure in elderly patients

Heart failure in elderly patients may be difficult to diagnose because of a lack of typical symptoms and physical findings that are common in younger patients with this disorder. When present, the symptoms and signs are often nonspecific and mistakenly may be thought to be caused by other disorders that are commonly present in elderly patients. In older elderly patients, the symptoms and signs may be obscured by the presence of aging changes or other diseases. As a result of these problems, physicians must be highly suspicious of heart failure in all elderly patients who have underlying heart disease or who present with nonspecific symptoms that may represent heart failure. After the diagnosis of heart failure is established, the cause must be determined and systolic and diastolic ventricular dysfunction must be differentiated.     

Gastrointestinal motility in the elderly]

The existence of specific, age-related changes in gastrointestinal motility with clinical significance is controversial. Beside the more infrequent primary motility disorders, secondary motility disturbances associated with collagen vascular diseases, endocrinopathies, and neuromuscular diseases are prominent in the older and often multimorbid patients. Especially in geriatric patients, motility associated symptoms are undesired side-effects of drug therapy. The pathophysiology, clinical syndromes, and therapeutic principles of motility disorders in the elderly are discussed. The major symptoms of esophageal dysfunction are dysphagia, chest pain, heartburn, and regurgitation. Oropharyngeal dysphagia, mostly caused by cerebrovascular accidents and other neurologic disorders, leads to disturbances in food intake, and is often complicated by broncho-pulmonary infections arising from recurrent aspiration of food or saliva. Gastrointestinal reflux disease and spastic motility disorders of the esophagus are regarded as possible causes of angina-like chest pain after exclusion of cardiac diseases. Motility disturbances of the stomach and small bowel are often related to systemic disease (i.e., diabetes mellitus, chronic intestinal pseudo-obstruction) of drug side-effects. Mental and physical decline, reduced fluid intake, and constipating drugs are the most relevant factors for idiopathic constipation in the elderly. Fecal incontinence means a great psychological strain for older patients and leads to social isolation.