smoking and cvd - apccrc v_dr. sandeep gupta.pdfsmoking and cvd ….what role for the cardiologist?...
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Smoking and CVD ….what role for the Cardiologist?
Dr Sandeep Gupta, MD, FRCP
Consultant Cardiologist Whipps Cross/BartsHealth NHS Trusts Hospitals, London, UK
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Tota
l Mor
talit
y To
tal M
orta
lity
Risk
Red
uctio
nR
isk R
educ
tion
in P
ost-M
I in
Pos
t-MI
Patie
nts (
%)
Patie
nts (
%)
1. GISSI. Lancet.1986, 1987; 2. ISIS 2. Lancet.1988; 3. AIMS. Lancet.1988, 1990; 4. ASSET. Lancet.1988, 1990;5. Antiplatelet Trialists’ Collaboration. BMJ.1994; 6. Yusuf et al. ProgCardiovasc Dis.1985;27:335–371;7. SAVE. N Engl J Med.1992; 8. AIRE. Lancet. 1993; 9. GISSI 3. J Am Coll Cardiol.1996; 10. ISIS 4. Lancet.1995;11. TRACE. N Engl J Med.1995; 12. 4S. Lancet. 1994;13. LIPID. N Engl J Med.1998.
5
10
15
20
25
30
35
40
45
50
ThrombolysisPPCI/ thrombolysis
1–41–4 AntiplateletAntiplatelet2,52,5 ββ-Blockers-Blockers66 ACE Inhibitor ACEI/ARB 7–117–11 StatinsStatins12,1312,13
10%–50%10%–50%
23%23%20%20%
7%–27%7%–27%22%–30%22%–30%
Therapy ClassTherapy Class
Therapeutic Advances in theTherapeutic Advances in theTreatment of Cardiovascular DiseaseTreatment of Cardiovascular Disease
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InterventionRisk
reduction (%)
Event rate (%)
None - 8
Asp/Clop 25 6
B-Blockers 25 4.5
Statins 30 3
ACEI 25 2.3
Post-MI setting
Stopping smoking, 36%
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Effects of smoking cessation in secondary prevention
Meta analysis of 20 studies (1978 to 2000)- 12,603 smokers with coronary heart disease- Follow-up: 3 to 7 yearsSustained quitters Continuing smokers
n = 5,659 n = 6,9441,044 deaths 1,884 deaths
18.4% 27.1%RR = 0.64 (CI 95%, 0.58 – 0.71)
Deaths- 36%
Non fatal myocardial reinfarction: - 32%RR = 0.68 (CI 95%, 0.57 - 0.82)
Critchley JA, Capewell S JAMA 2003: 290: 86-97
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May 2004
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65% of the world’s smokers live in10 countries
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The young
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Hatched areas indicate proportions of deaths related to tobacco use.
Tobacco Is a Risk Factor for 6 of the World’s 8 Leading Causes of Death
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SMOKING: EFFECT ON CORONARY ARTERY DISEASE1
1. Waters D et al. Circulation 1996;94:614–21
Progression of existing lesions after 2 years
Formation of new lesions after 2 years
37%
57%
p=0.00250
40
30
20
10
0
Patie
nts
(%)
Non-smokers Currentsmokers
50
40
30
20
10
0
p=0.007
Patie
nts
(%)
20%
36%
Currentsmokers
Non-smokers
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After CABG Risk of reoperation x 2.5 at 1 year for non quitters1
After angioplastyRisk of mortality x 1.4 at 4.5 years for non quitters2
1. Voors AA et al Circulation 1996; 93: 42-72. Hasdai D et al N Engl J Med 1997; 336: 755-61
Effects of smoking cessation in secondary prevention
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Smoking: a particular risk factorThe essential and often unique risk factor for acute coronary syndromes in young adults
6,448 patients with STEMI
The prevalence of smoking is very important in myocardial infarction under 50 years….with the same prevalence among men and women
Thomas D et al. Étude ALLIANCE Journées Européennes de la SFC Janvier 2007
% of smokers by age and gender
0.97 0.94 0.74 0.83 0.55 0.60 0.68 0.40 0.18 0.25
Global Female/Male prevalence = 0.38
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Worldwide burden of disease from exposure to second-hand smoke: a retrospective analysis of data from 192 countries
• Second-hand smoke = 603,000 deaths worldwide
• Nearly 2/3 of these deaths are caused by ischaemic heart disease in adult non-smokersLower
respiratoryinfectionsin children<5 years
Otitismedia inchildren<3 years
Asthmain
children<15 years
Asthmain adults
Lungcancer in
adults
Ischaemicheart
disease inadults
TOTAL
165,000 71 1,150 35,800 21,400 379,000 603,000
Öberg M et al. Lancet, 2011, 377, 139-146.
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For every one cigarette smoked you will lose 11 minutes of life
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Q: How many cigarettes
needed to cause a heart attack?
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10th Dec 2010
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Q: How quickly does a cigarette
cause harm?
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Q: How does a cigarette cause
harm?
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Q: How long does it take to quit smoking?
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25th January 2011
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Q: What CV benefits with
smoking cessation?
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CARDIOVASCULAR BENEFITS OF SMOKING CESSATION
Short-term benefits↑ HDL; decreased LDL↓ Arterial pressure↓ Heart rate
Improved arterial compliance↓ Risk of arrhythmic death after myocardial infarction (MI)↓ Platelet volume
Long-term benefits – reduced risk of:•Stroke •Recurrent coronary events after MI•Arrhythmic death after MI•Secondary cardiovascular disease (CVD) events
1. Terres et al. Am J Med 1994; 97: 242–9. 2. Wannamethee et al. JAMA 1995; 274: 155–60. 3. Nilsson et al. J Int Med 1996; 240: 189–94. 4. Oren et al. Angiology 2006; 57: 564–8. 5. Peters et al. J Am Coll Cardiol 1995; 26: 1287–92. 6. Rea et al. Ann Intern Med 2002; 137: 494–500. 7. Twardella et al. Eur Heart J 2004; 25: 2101–8.
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The cycle of nicotine addiction
• Nicotine binding causes an increase in release of Dopamine1,2
• Dopamine gives feelings of pleasure and calmness1
• The smoker craves Nicotine to release more Dopamine to restore pleasure and calmness1
• Competitive binding of Nicotine to nicotinic acetylcholinergic receptors causes prolonged activation, desensitization, and upregulation2
• As Nicotine levels decrease, receptors revert to an open state causing hyperexcitability leading to cravings1,2
1. Jarvis MJ. BMJ. 2004; 328:277-279. 2. Picciotto MR, et al. Nicotine and Tob Res. 1999: Suppl 2:S121-S125.
Dopamine
Nicotine
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• Because CHAMPIX is bound to the receptor, it prevents the binding of nicotine
• CHAMPIX reduces the pleasurable and reinforcing effects of smoking
1. Hays JT et al. Am J Med 2008;121(4A):S32-S424. Foulds J. Int J Clin Pract. 2006; 60(5):571-6.
Partial Antagonist 1,4
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Q: Is smoking cessation safe to use in Cardiac patients?
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January 2010
January 2010
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Cardiovascular events and all deaths
Varenicline (n = 353) Placebo (n = 350) n % n %
Any adjudicated cardiovascular event* 26 7.4 23 6.6Coronary artery diseaseNon-fatal MI 7 2.0 3 0.9Need for coronary revascularization 8 2.3 3 0.9Hospitalization for angina pectoris 8 2.3 8 2.3Hospitalization for congestive heart failure 0 0.0 2 0.6
Cerebrovascular diseaseNon–fatal stroke 2 0.6 1 0.3Transient ischemic attack 1 0.3 1 0.3
Peripheral vascular disease (PVD)New diagnosis or admission for a procedure to treat PVD 5 1.4 3 0.9
Death – all causes 2 0.6 5 1.4Cardiovascular death 1 0.3 2 0.6Non–cardiovascular death 1 0.3 3 0.9
*Reported or observed cardiovascular events or deaths from any cause were reviewed separately and adjudicated under blinded conditions by an independent event committee
No different to placebo
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Hypertensive smokers have higher cardiovascular risk despite treatment for blood pressure
SMOKING REDUCES BENEFITS ASSOCIATED WITH ANTIHYPERTENSIVE TREATMENT
Journath G et al. Blood Pressure 2005;14:144–50
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Up to a 63% higher risk of vascular events in
smokers vs non-smokers despite
treatment with statins
SMOKING REDUCES SOME OF THE BENEFITS OF STATINS
Milionis HJ et al. Angiology 2001;52:575–87
Statin
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Evidence from the UK
Real Price and Consumption of Cigarettesin the UK, 1971-96
9000
10000
11000
12000
13000
14000
15000
16000
17000
1971 1974 1977 1980 1983 1986 1989 1992 1995
Year
£ 1.25
£ 1.45
£ 1.65
£ 1.85
£ 2.05
£ 2.25
£ 2.45
£ 2.65
Pric
e (£)
1994
valu
e
PRICE
CONSUMPTION
Source: Townsend J 1998, Central Statistical Office (UK) (1965-93)
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Cost effectiveness
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A Brief Intervention (?)
Ask
Advise
Assess
Assist
Arrange
… about smoking status
… to quit
… willingness to quit
… by offering treatment
… follow up
Fiore MC, et al. Treating Tobacco Use and Dependence: 2008 Update. Clinical Practice Guideline. US Department of Health and Human Services. Public Health Service; May 2008. Available at: www.surgeongeneral.gov/tobacco/default.htm
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ABC is a reminder of what to do
A = Ask about smoking
B = Brief advice to be smokefree
C = Cessation support
Ministry of Health. 2007. New Zealand Smoking Cessation Guidelines. Wellington: Ministry of Health.
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42
0
10
20
30
40
50
60
70
Advice Offer of treatment
% in
crea
se in
qui
t atte
mpt
sAdvising to quit versus offer of treatment
Aveyard P. Keeping smoking cessation interventions brief and effective. Smoking Cessation Rounds 2009; Vol 3, Issue 2.
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Potential algorithm for smoking in the cardiac setting
Step 3:REFER and/orTREAT
REFER the patient to a specialised clinic for smoking cessation support and/or, if appropriate, supply an initial prescription
Step 1:ASK
On admission to A&E or CCU, ASK if patient is a smoker and RECORD it if they are
This can be done by any member of the multi-disciplinary team
Step 2:ADVISE
When the patient’s condition has been stabilised, ADVISE the patient that they should stop smoking in order to reduce their risk of further CV complications. Ask if they are willing to try to stop.
1Smoker: No Smoker: Yes
Suggestion: Use self adhesive coloured labels on the notes or patient chart to identify smoking status
Willing: No Willing: Yes
Reinforce their decision and give the patient some reading material on the benefits of stopping smoking
Ask that they think about the benefits of stopping and that they ask for help if they want to try in the future
2
3Clinic in same hospital:
NoClinic in same hospital : Yes
Ask the clinic staff to visit the patient while they are in hospital
Write to the patient’s GP regarding their smoking status and actions that have been taken. Request GP follow up.
Ministry of Health. 2007. New Zealand Smoking Cessation Guidelines. Wellington: Ministry of Health
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Better Lung Health For All
What about electronic cigarettes?
…A solution that could lead to the end of tobacco?
Or
…A huge gamble that will harm health and lead young people to smoking?
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Better Lung Health For All
Will e-cigarettes encourage children to start smoking?
Most UK children have heard of e-cigarettesIn one 2015 survey by ASH:
•13% of 11-18 year olds had tried them at least once
•2.4% had used them regularly (once a month or more)
Source:ASH (2015)
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Better Lung Health For All
What are the benefits of e-cigarettes?
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Better Lung Health For All
What are the benefits of e-cigarettes?
• Less harmful than conventional cigarettes– Far fewer harmful components
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Better Lung Health For All
Are e-cigarettes safe?
Image:Mikael Häggström, from Wikipedia
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MECHANISMS
Possible
Probable
Definite
Mechanisms by which nicotine may contribute to Coronary Heart Disease
Benowitz, 1991Hyperlipididemia
Endothelial Injury
Platelet Activation Thrombosis
Coronary Vasoconstriction
Increased Heart RateMyocardial Contractility
Hemodynamic Stress
Increased Circulating Catecholamines
Sudden Death
Premature Atherosclerosis
Vascular Stenosis or Occlusion
Myocardial Ischemia or Infarction
Arrhythmias
Sympathoadrenal Activation
NICOTINE
CARBON MONOXIDE
Decreased Oxygen
Transport
TXA2
Benowitz, 1991
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Referrals to stop smoking service
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Brief advice works
• You advise just one smoker every day to quit (time taken = 30 seconds)
• Over 40 days this would have taken up 20 minutes of your time, but one of those 40 people will quit long term*
• Over 1 year and you will have prompted six people to stop smoking, using about 2 hours effort from you
• Consider that by investing 2 hours of your time in that year, you’ve saved 3 of those people’s lives!
*Lancaster T & Stead L. (2004) Physician advice for smoking cessation, Cochrane Database Syst Rev, CD000165