Senior Cardiac Nutrition Depletion in LTC | Healos™

• Senior Cardiac Nutrition Depletion: The Silent Burden

#LTC, #Senior Nutrition, #Malnutrition, #Vitamin B12, #Vitamin D, #Magnesium, #Protein, #Heart Failure

Malnutrition in older cardiac patients rarely looks dramatic. It looks like half a lunch left on the plate, a resident who is "just a bit more tired lately", a slow slide in weight that nobody quite notices because clothes are loose anyway. It is quiet, cumulative and very easy to attribute to age.

The short answer: older adults with heart disease face a double squeeze on nutrition. Ageing reduces appetite, thirst and absorption of nutrients such as vitamin B12, while cardiac medications add predictable losses of magnesium, potassium, B12 and coenzyme Q10. About 45% of adults admitted to Canadian hospitals are malnourished, and long-term care residents are at similar risk, so routine screening matters.

简短的答案：

老年心脏病人的营养不良很少显得触目惊心：午餐剩下一半，住户「最近有点更累」，体重慢慢下滑，因为衣服本来就宽松没人注意。它安静、累积、极易被归咎于年龄。

患心脏病的老年人在营养上受到双重挤压：衰老降低食欲、口渴感和 B12 等营养素吸收，心脏药物又带来镁、钾、B12 和辅酶 Q10 的可预测流失。约 45% 的加拿大住院成年人营养不良，长期护理住户风险相近，常规筛查很重要。

The first squeeze: what ageing does to nutrition

Appetite and taste. Appetite declines with age, a pattern sometimes called the anorexia of ageing. Taste and smell dull, dentures and dry mouth make eating harder, and medications can alter taste further.

Absorption. Between 10 and 30% of older adults have atrophic gastritis or reduced stomach acid, which impairs absorption of vitamin B12 from food. For that reason, adults over 50 are advised to get most of their B12 from fortified foods or supplements rather than relying on diet alone (Institute of Medicine, 1998).

Thirst. The sense of thirst weakens with age, so older adults often drink less than they need without feeling thirsty, which matters a great deal for anyone on a diuretic.

Muscle. Older adults need more protein, not less, to maintain muscle. The PROT-AGE group recommends 1.0 to 1.2 g per kilogram of body weight daily for healthy older adults, and 1.2 to 1.5 g/kg for those with acute or chronic illness (Bauer et al., JAMDA, 2013), unless kidney disease requires otherwise. Many residents fall well short.

Swallowing. Dysphagia is common after stroke and in advanced frailty, and texture-modified diets can reduce both intake and nutrient density if not carefully planned.

第一重挤压：

衰老对营养的影响：

食欲和味觉：食欲随年龄下降（「衰老性厌食」），味觉嗅觉迟钝，假牙和口干让进食更难，药物还会改变味觉。

吸收：10–30% 的老年人有萎缩性胃炎或胃酸减少，影响食物中 B12 的吸收，因此建议 50 岁以上者主要从强化食品或补充剂获取 B12（IOM 1998）。

口渴感：随年龄减弱，老人常在不觉得渴时就饮水不足，对服用利尿剂者尤为重要。

肌肉：老年人需要更多而非更少的蛋白质来维持肌肉，PROT-AGE 建议健康老人每天每公斤体重 1.0–1.2 克、有急慢性疾病者 1.2–1.5 克（除非肾病另有要求），很多住户远未达到。

吞咽：卒中后和严重衰弱者常见吞咽困难，质地调整饮食若规划不当，会同时降低摄入量和营养密度。

The second squeeze: what cardiac medications add

Layered on top of ageing is the medication list. The average cardiac resident takes several drugs with known nutritional effects (see the drug-nutrient debt for the clinician's version).

• Loop and thiazide diuretics increase urinary losses of magnesium and potassium, and in combination with reduced thirst they raise the risk of dehydration.

• Proton pump inhibitors, common in residents on antiplatelet therapy, can lower magnesium with long-term use, and two or more years of use was associated with 65% higher odds of B12 deficiency (Lam et al., JAMA, 2013), compounding the absorption problem of ageing.

• Metformin, for residents with diabetes, further lowers B12.

• Statins lower coenzyme Q10, which may contribute to muscle symptoms and fatigue in some residents.

• Low-dose aspirin and anticoagulants can contribute to iron deficiency through small, unnoticed blood losses.

Each effect is modest on its own. Combined with poor intake and reduced absorption, they add up to a burden that shows up as fatigue, weakness, falls, confusion or arrhythmias.

第二重挤压：

心脏药物的叠加： 在衰老之上还叠加了用药清单。袢利尿剂和噻嗪类增加镁钾流失，再加上口渴感下降，脱水风险升高；质子泵抑制剂在服用抗血小板药的住户中很常见，长期使用可降低镁，两年以上与 B12 缺乏几率高 65% 相关，使衰老带来的吸收问题雪上加霜；二甲双胍进一步降低 B12；他汀降低辅酶 Q10，可能导致部分住户肌肉症状和疲劳；低剂量阿司匹林和抗凝药可能通过不易察觉的少量失血导致缺铁。

每一项单独都不大，但与摄入不足和吸收下降叠加后，会以疲劳、无力、跌倒、意识混乱或心律失常的形式表现出来。

The salt paradox in frail cardiac residents

Low-sodium diets are standard advice for heart failure and high blood pressure. In frail older adults with poor appetite, though, a strict low-salt menu can make food so unappealing that total intake falls, and inadequate protein and calories may do more harm than a moderate amount of salt.

This isn't an argument against sodium restriction. It is an argument for individualising it with the physician and dietitian, especially for residents who are losing weight. The goal is a diet the resident will actually eat. Herbs, spices, acidity and texture can do a lot of the work that salt used to do.

Salt substitutes deserve a specific warning. Most are based on potassium chloride, and residents taking ACE inhibitors, ARBs or spironolactone, particularly with reduced kidney function, can develop high potassium if they use them freely.

衰弱心脏住户的「盐悖论」： 低钠饮食是心衰和高血压的标准建议，但对食欲差的衰弱老人，严格低盐可能让食物难以下咽、总摄入下降，蛋白质和热量不足的危害可能大于适量的盐。

这不是反对限钠，而是主张与医生和营养师一起个体化，尤其对体重下降的住户——目标是住户真正会吃的饮食，香草、香料、酸味和口感可以承担很多原本由盐完成的工作。

代盐需要特别提醒：多数以氯化钾为主，服用 ACEI、ARB 或螺内酯（尤其肾功能减退）的住户随意使用可能出现高钾血症。

A 10-minute monthly nutrition check for cardiac residents

Screening doesn't need to be elaborate to be useful. A short monthly routine, shared between nursing, dietary and pharmacy staff, catches most problems early.

1. Weight trend. Compare this month with last month and with three months ago. Unplanned loss of 5% or more in a month, or 10% over six months, is a common trigger for dietitian review. In heart failure residents, remember that fluid can mask muscle loss.

2. Meal and fluid intake. Note residents regularly leaving more than a quarter of their meals, and anyone whose fluid intake is falling while on a diuretic.

3. Medication changes. Any new diuretic, PPI, metformin or dose change is a prompt to check electrolytes and review nutrition.

4. Energy and function. New fatigue, weakness, falls or confusion deserve a nutrition question as well as a medical one.

5. Supplements and salt substitutes. Ask families what they bring in. Well-meaning gifts of supplements or potassium-based salt substitutes are a common blind spot.

Most homes already collect much of this information. The gain comes from reviewing it together, on a schedule, with the medication list in view.

心脏住户每月 10 分钟营养检查： 筛查不必复杂也能有用。由护理、膳食和药房共同完成的简短月度流程能及早发现多数问题：

① 体重趋势：与上月及三个月前比较，一个月内非计划体重下降 5% 以上或六个月内 10% 以上，常作为营养师评估的触发点；心衰住户的体液可能掩盖肌肉流失。

② 进食与饮水：记录经常剩下超过四分之一餐食的住户，以及服用利尿剂时饮水量下降者。

③ 药物变更：任何新增利尿剂、PPI、二甲双胍或剂量调整，都应检查电解质并复查营养。

④ 精力与功能：新出现的疲劳、无力、跌倒或意识混乱，除了医学问题也要问营养问题。

⑤ 补充剂与代盐：询问家属带来了什么，好意送来的补充剂或含钾代盐是常见盲点。大多数机构已在收集这些信息，收获来自于按计划、对照用药清单一起审阅。

How Healos™ supports nutrition in LTC

Healos™ supports long-term care teams as complementary help alongside dietitians, nurses, physicians and consultant pharmacists. For LTC partners, every resident plan starts with the medication list, so predictable drug-nutrient effects and supplement interactions are flagged for the pharmacist before anything is added. Structured resident summaries built on the H-Index help teams track intake, energy, mood and function over time, and materials are available in English and Chinese for residents and families.

Healos™ nutritional products are Health Canada NPN-licensed and positioned as complementary support, never as treatment for malnutrition or any medical condition. Clinical decisions, including any supplementation, remain with the resident's care team.

Healos™ 如何支持长期护理中的营养：

Healos™ 作为营养师、护士、医生和顾问药剂师之外的辅助力量支持长期护理团队：每个住户方案都从用药清单开始，在添加任何东西之前为药剂师标记可预测的药物-营养影响和补充剂相互作用；基于 H-Index™ 的结构化住户摘要帮助团队长期追踪摄入、精力、情绪和功能；为住户和家属提供中英文材料。

Healos™ 营养产品获 Health Canada NPN 许可，定位为辅助支持，绝不作为营养不良或任何疾病的治疗；包括补充剂在内的临床决策始终由住户的医疗团队做出。

The bottom line

Nutrient depletion in older cardiac patients is silent because every piece of it looks like ageing. Put together, reduced appetite and absorption plus predictable medication effects create a burden that affects strength, cognition, heart rhythm and readmission risk. A short, regular screening routine makes the invisible visible, while there is still time to act.

结论： 老年心脏病人的营养耗竭之所以无声，是因为每一部分看起来都像衰老。但食欲和吸收下降加上可预测的药物影响，合起来会形成影响力量、认知、心律和再入院风险的负担。一套简短、定期的筛查流程，能在还来得及行动时让看不见的东西变得可见。

Frequently asked questions

Why are older heart patients at risk of malnutrition? Ageing reduces appetite, thirst and nutrient absorption, and cardiac medications add losses of magnesium, potassium, vitamin B12 and coenzyme Q10. Low-salt diets, dental problems and swallowing difficulties can further reduce intake.

How much protein do older adults need? The PROT-AGE group recommends 1.0 to 1.2 g of protein per kg of body weight daily for healthy older adults and 1.2 to 1.5 g/kg for those with acute or chronic illness, unless kidney disease requires a different target set by their care team.

Why do older adults need vitamin B12 from fortified foods or supplements? Between 10 and 30% of older adults absorb food-bound vitamin B12 poorly because of reduced stomach acid. Long-term proton pump inhibitors and metformin can lower B12 further, so checking levels in older cardiac patients is worthwhile.

Should seniors in long-term care take vitamin D? Osteoporosis Canada recommends 800 to 2,000 IU of vitamin D daily for adults over 50, and supplementation is common in long-term care because residents get little sun exposure. The resident's care team should confirm the appropriate amount.

Do diuretics cause nutrient deficiencies in older adults? Loop and thiazide diuretics increase magnesium and potassium losses, and combined with a weaker sense of thirst they raise the risk of dehydration. Regular monitoring of electrolytes, weight and fluid intake is important.

常见问题：

• 老年心脏病人为什么容易营养不良？衰老降低食欲、口渴感和吸收，心脏药物增加镁、钾、B12 和 CoQ10 流失，限盐饮食、口腔问题和吞咽困难进一步减少摄入。

• 老年人需要多少蛋白质？PROT-AGE 建议健康老人每公斤 1.0–1.2 克，有急慢性疾病者 1.2–1.5 克，肾病者由医疗团队另定。

• 为什么老人要从强化食品或补充剂获取 B12？10–30% 老人因胃酸减少吸收差，长期 PPI 和二甲双胍会进一步降低，值得检测。

• 长期护理住户要补维生素 D 吗？Osteoporosis Canada 建议 50 岁以上每日 800–2,000 IU，具体剂量由医疗团队确认。

• 利尿剂会导致老人营养缺乏吗？会增加镁钾流失，加上口渴感减弱易脱水，需定期监测电解质、体重和饮水量。

References

1. Allard JP, et al. Malnutrition at hospital admission: contributors and effect on length of stay. A prospective cohort study from the Canadian Malnutrition Task Force. JPEN Journal of Parenteral and Enteral Nutrition. 2016;40(4):487–497.

2. Institute of Medicine. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline. National Academies Press; 1998.

3. Bauer J, et al. Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. JAMDA. 2013;14(8):542–559.

4. Hanley DA, et al. Vitamin D in adult health and disease: a review and guideline statement from Osteoporosis Canada. CMAJ. 2010;182(12):E610–E618.

5. Lam JR, et al. Proton pump inhibitor and histamine 2 receptor antagonist use and vitamin B12 deficiency. JAMA. 2013;310(22):2435–2442.

6. Aroda VR, et al. Long-term metformin use and vitamin B12 deficiency in the Diabetes Prevention Program Outcomes Study. Journal of Clinical Endocrinology & Metabolism. 2016;101(4):1754–1761.