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 Table of Contents  
REVIEW ARTICLE
Year : 2016  |  Volume : 2  |  Issue : 2  |  Page : 86-94

Algorithms for cardiovascular disease prevention


1 Department of Cardiology, AIIMS, New Delhi, India
2 Department of Pharmacology, AIIMS, New Delhi, India

Date of Web Publication7-Oct-2016

Correspondence Address:
Sandeep Seth
Department of Cardiology, AIIMS, New Delhi
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2395-5414.191529

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  Abstract 

Prevention of coronary artery disease requires control of risk factors. It is not enough to take out guidelines, it is necessary to implement the guidelines. There are a number of studies which have shown that quite often guidelines are not followed.In this article, we have abstracted the essence of the guidelines into simple to follow algorithms so that they are easy to remember and also teach. For Cardiovascular risk reduction, general measures include stopping smoking, perform 150 minutes of moderate activity per week and take a low fat and low salt diet. For hypertension: All classes of drugs are suitable but generally (NICE 2011) Angiotensin receptor blockers or Angiotensin converting enzyme inhibitors for young (<55 years), Beta blockers ( only if other compelling indications). In elderly (>55 years, many with isolated systolic hypertension) Calcium channel blockers, diuretics if needed , are prefered. Combinations are used if monotherapy does not work. For dyslipidemia: Statin benefit groups are defined and manifest coronary artery disease and Diabetics above 40 years should get high dose statins. Lipid levels are only tested to look for compliance or further intensification of regime. Diabetes: Metformin is the drug of choice, Sulfonylureas can be used in combination. Glyptins are also safe and can be used. Other drugs should be used with the help of the endocrinologist.

Keywords: Algorithms, CAD, cardiovascular disease guidelines, India, prevention


How to cite this article:
Seth S, Ramakrishnan S, Roy A, Karthikeyan G, Verma SK, Bhargava B, Maulik S K. Algorithms for cardiovascular disease prevention. J Pract Cardiovasc Sci 2016;2:86-94

How to cite this URL:
Seth S, Ramakrishnan S, Roy A, Karthikeyan G, Verma SK, Bhargava B, Maulik S K. Algorithms for cardiovascular disease prevention. J Pract Cardiovasc Sci [serial online] 2016 [cited 2021 Aug 3];2:86-94. Available from: https://www.j-pcs.org/text.asp?2016/2/2/86/191529


  Introduction Top


Cardiovascular risk reduction requires focused reduction of the various cardiovascular disease (CVD) risk factors. Clear guidelines are available for the management of each risk factor, but it is often not possible for many physicians to stay abreast with the latest guidelines. In this article, we have tried to convert the latest and the best available guidelines for cardiovascular risk reduction into simple algorithms which are just one or two pages per risk factor and easy to read. They are not comprehensive, and many details have been removed for simplification. It is hoped that the algorithms will ensure that a basic level of prevention will be provided by all health-care providers in a similar and standardized manner. These have been designed in the form of two pages which are meant to be handouts along with supplementary material for each major risk factor (hypertension, diabetes, and dyslipidemia). These have been arrived by consensus and are not meant to replace existing guidelines but just to provide a starting point for therapy.


  General Preventive Measures Top


  • Stop smoking and tobacco use
  • It is recommended for healthy adults of all ages to perform at least 150 min a week of moderate intensity or 75 min a week of vigorous-intensity aerobic physical activity [1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12]
  • Diet: Energy intake should be limited to the amount needed to maintain a body mass index between 20.0 and 25.0 kg/m 2. Saturated fatty acids (<10% of total energy intake) replacement by polyunsaturated fatty acids. Salt intake should be <5 g of salt per day, 2–3 servings of fruit per day, and 2–3 servings of vegetables per day. Consumption of sugar-sweetened soft drinks and alcoholic beverages consumption must be discouraged.[13]



  Hypertension Management Top


The recommendations in this paper [Figure 1] and [Figure 2] have been adapted from multiple sources, mainly the NICE guidelines of 2011 and the ESC statement of CVD reduction 2016. Physicians are expected to take this statement into account, along with the individual needs and preferences of their patients.[13],[14]
Figure 1: Hypertension management (insert one).

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Figure 2: Hypertension management ( part 2).

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Insert 1

It is the main algorithm for the management of hypertension. Most of the classes of antihypertensives (angiotensin converting enzyme [ACE] inhibitors/angiotensin receptor blockers [ARBs], calcium channel blockers [CCB], and diuretics) can be used initially unless there are specific indications but in the NICE guidelines, it was suggested that younger patients would be benefited by starting with ACE inhibitors or ARBs. Beta blockers are not preferred in young unless they have compelling reasons such as heart failure (HF) or angina. In elderly, where isolated systolic hypertension is more likely CCBs are preferred. Diuretics are not often preferred initially because of their tendency to cause metabolic problems.

The management starts usually with lifestyle modification (Insert 2) and one drug. Two drugs are used if the blood pressure (BP) is not controlled and a third drug is added if it is still not controlled. Combinations can be used.

Insert 2

It contains the targets. The targets are simple: Treat BP above 140/90 mmHg and bring it below 140/90 mmHg. If SPRINT results are to be followed then the ESC guidelines suggest that the targets can be lowered slightly to 130–139/80–85 mmHg, keeping in mind that the very strict control in SPRINT was also associated with adverse effects.

Physicians should use Insert 1 as a desktop reminder.

Diabetes

The keys points a cardiologist needs to focus on are as follows [Figure 3] and [Figure 4]:
Figure 3: Diabetes management (part one).

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Figure 4: Diabetes management (part 2).

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  • The multifactorial approach is very important. Intensive management of hyperglycemia reduces the risk of microvascular complications and CVD. Intensive treatment of BP in diabetes mellitus (DM), with a target of 140 mmHg systolic for the majority, reduces the risk of microvascular and macrovascular outcomes. A lower systolic blood pressure target further lessens the risks for stroke, retinopathy, and albuminuria and should be applied to selected patients. All patients >40 years of age and selected younger patients at elevated risk are recommended for the statin therapy. In DM patients with existing CVD, the use of a sodium-glucoseco-transporter-2 (SGLT-2) inhibitor substantially lessened CVD and total mortality and HF hospitalization without major adverse effects [13],[15],[16]
  • A target HbA1c for the reduction in risk of CVD and microvascular complications in DM of <7.0% is recommended for the majority of adults with DM
  • BP targets in Type 2 DM are <140/85 mmHg, with a lower target of <130/80 mmHg recommended for some patients (younger patients at elevated risk for complications) for additional gains on stroke, retinopathy, and albuminuria risk. Renin-angiotensin-aldosterone system blocker is recommended in the treatment of hypertension in DM, particularly in the presence of proteinuria or microalbuminuria. Recommended BP target in patients with Type 1 DM is <130/80 mmHg
  • In DM patients at very high-risk, a low-density lipoprotein cholesterol (LDL-C) target <70 mg/dL or a reduction of at least 50% if the baseline LDL-C is between 70 and 135 mg/dL is recommended.


  • Choice of drugs for diabetes control:
  • Metformins are the first choice of drug
  • Sulfonylureas can be used if metformins cannot be used as the first choice
  • Gliptins can be considered as the first line only if either of metformin or sulfonylurea cannot be used
  • After 3 months of these drugs, combinations of these or dose increase or adding insulin can be done. Beyond this, the other drugs should be used with the help of an endocrinologist.



  Hyperlipidemia Management for the Cardiologist Top


These have been adapted from the AHA and ESC guidelines (2016 and 2013 and also with some suggestions picked up from the lipid association of India statements and other publications from India).[17],[18],[19],[20],[21],[22],[23],[24],[25],[26],[27]

The main message clear from all the lipid control guidelines is that there are four sets of patients who need to be defined as the statin benefit groups. These are as follows [Figure 5] and [Figure 6]:
Figure 5: Dyslipidemia management (part one).

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Figure 6: Dyslipidemia management (part two).

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Individuals

  1. Adults >21 years with clinical atherosclerotic CVD (ASCVD)
  2. Adults >21 years with primary elevations of LDL-C >190 mg/dL
  3. Diabetes aged 40–75 years with LDL-C 70–189 mg/dL and without clinical ASCVD
  4. Individuals without clinical ASCVD or diabetes with LDL-C 70–189 mg/dL and estimated 10-year ASCVD risk >7.5%.


The last group which involves primary prevention is the group where for India we would probably need to lower the age to first start looking at risk to 21 years. Moreover, we would also need to use different calculators for risk calculation. Some of the risk calculators which have Indian data available include QRISK2 (use a cutoff of 10%) and JBS3, International Atherosclerosis Society 2013 (lifetime risk: Intervene in high and very high risk, uses smoking, diabetes, BP and cholesterol, and ethnic correction). Any calculator can be used but the basic idea that Indians with increasing age and with addition of risk factors such as family history, smoking, and then diabetes; dyslipidemia should be considered for primary prevention at low thresholds with or without the use of these calculators.

The main purpose of the statins is that moderate-intensity therapy (lowering LDL-C by approximately 30–<50%) or high-intensity statin therapy (lowering LDL-C by approximately ≥50%) is a critical factor in reducing ASCVD events.

High intensity statins

Lower LDL-C by 50%: e.g., atorvastatin 40–80 mg, rosuvastatin 20–40 mg.

Moderate intensity statins

Lower LDL-C by 30%, e.g., atorvastatin 10–20 mg, rosuvastatin 10–20 mg.

Indian perspective

Indians are 5-fold more prone to myocardial infarction and cardiovascular death. They are prone to develop coronary artery disease before 40 years of age. Studies suggest that Indians achieve higher levels of circulating statins compared to the Caucasian population. Investigation of Rosuvastatin in South Asian Subjects Trial showed that LDL-C decreased by 45% with rosuvastatin 10 mg versus 40% with atorvastatin 10 mg and by 50% with rosuvastatin 20 mg versus 47% with atorvastatin 20 mg.


  Conclusion Top


These algorithms have been developed with a view to disseminate the current guidelines to as wide an audience as possible and standardize cardiovascular risk management to simple principles. These should not be considered as very comprehensive statements but just initial guiding principles to start treatment in various areas of cardiovascular disease prevention.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

 
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    Figures

  [Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6]



 

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