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246
A. Hartley and S. Nijjer
Highlights
What we know already
PROMs are gaining mounting
significance in studies investigating
HRQOL benefits with PCI.
PROMs are especially important in the
management of stable coronary artery
disease, where PCI is performed
principally in the aim of symptomatic
Fig. 13.3 Study highlights
benefit.
What this study adds
In this systematic review, HRQOL
outcome measures generally
demonstrate an improvement from
baseline scores pre-procedure with PCI.
However, the magnitude of HRQOL gains
appears to often be limited or short-
lived, especially when compared to other methods of revascularisation.
tify the true symptomatic benet of elective PCI. In addition, there is now consensus in the cardiology community on what constitutes a myocardial infarction [55] and major adverse bleeding [56] for reporting in clinical trials of PCI.However, no such consensus exists for qual­ity of life outcomes. Thus, there is a real need for the formulation of an expert working group, aim­ing to clarify issues and standardise practice on HRQOL reporting following PCI.
Separately, given that PROMs are ‘soft’ end­points that can be affected by patient knowledge of treatment allocation, serious consideration should be given to the use of placebo procedures, or some other method of patient blinding, in future RCTs. Where this is not possible, or in the case of observational studies, long term follow up should be supported.
Future outlook
Future studies should focus on a few
well-validated HRQOL tools.
Long term follow up and ideally a
placebo procedure would also increase
the value of PROMs in future studies.
tant and necessary. In this study HRQOL out­come measures with PCI generally demonstrate an improvement from baseline scores pre­procedure. However, the magnitude of these gains appears to be limited, and in some instances, relatively short-lived when compared to other methods of revascularisation or medical therapy. Future studies should focus on a few well­validated HRQOL tools, provide long term fol­low up and ideally use a placebo procedure. Figure 13.3 highlights the key ndings of this analysis.
Funding A.H. is funded by a Wellcome Trust Clinical Research Fellowship.
Conict of Interest None declared.
Conclusions
PROMs are increasingly fashionable and gaining mounting signicance in studies investigating potential HRQOL benets with PCI.This is the case most pertinently in elective PCI procedures, predominantly carried out for symptomatic gains, where quantiable improvements are both impor-
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Quality ofLife andPatient
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Reported Outcome Measures Following Carotid Artery Intervention
LeonardL.Shan, AkshatSaxena, andAlunH.Davies
14
Abbreviations
ACAS Asymptomatic carotid atheroscle-
rosis study
ACST The asymptomatic carotid surgery
trial
CREST Carotid revascularisation endar-
terectomy versus stenting trial ECST European carotid surgery trial NASCET The North American symptomatic
carotid endarterectomy trial SAPPHIRE Stenting and angioplasty with pro-
tection in patients at high risk for
endarterectomy trial
L. L. Shan (*) St. Vincent’s Hospital Melbourne, Melbourne, VIC, Australia
Department of Surgery, The University of Melbourne, Melbourne, VIC, Australia e-mail: leonard.shan@unimelb.edu.au
A. Saxena Department of Cardiothoracic Surgery and Transplantation, Fiona Stanley Hospital, Murdoch, WA, Australia
A. H. Davies Charing Cross, London, UK
St. Mary’s Hospital, London, UK
Vascular Surgery, Department of Surgery and Cancer, Imperial College London, London, UK e-mail: a.h.davies@imperial.ac.uk
Introduction
Stroke and transient ischemic attacks are a seri­ous public health problem which commonly causes persistent disability and poor quality of life (QOL) [13]. A signicant proportion of ischemic strokes (18–29%) are attributable to carotid artery disease [4, 5] and are preventable by revascularisation [6]. The benet of carotid revascularisation by either carotid endarterec­tomy (CEA) or carotid stenting (CAS) has been well established previously. However, these focus on technical outcomes such as morbidity, mortal­ity, and stroke prevention. Whilst these are important, they provide only one aspect of the intervention outcome.
From the early 1990s the concept of QOL and patient reported outcomes measures (PROMS) were identied as an important assessment of post-operative outcomes [7]. In particular, QOL after surgery is a patient-focussed assessment that complements traditional outcome measures such as post-operative stroke and death [8].
This chapter summarises the available litera­ture on QOL and PROMS after carotid artery intervention. The current literature provides mainly QOL outcomes after CEA or CAS in ath­erosclerotic disease. This is therefore the focus of this chapter. Other indications and procedures are outside of the scope of this chapter.
© Springer Nature Switzerland AG 2022 T. Athanasiou et al. (eds.), Patient Reported Outcomes and Quality of Life in Cardiovascular Interventions,
https://doi.org/10.1007/978-3-031-09815-4_14
249
250
L. L. Shan et al.
Current Interventions ontheCarotid Artery
Carotid Endarterectomy
Several landmark trials have provided strong evidence for CEA in stroke prevention. The ben­et is greatest in symptomatic carotid stenosis as outlined in the NASCET and ECST trials [9, 10]. The ACAS and ASCT trials demonstrated that CEA is also benecial in carefully selected asymptomatic patients with few comorbidities, good life expectancy, and low institutional peri­operative stroke and mortality rates [1114]. The combined peri-procedural mortality and stroke rate after CEA is 3.2–6.7% in symptomatic patients [10, 1518] and 2.9–3.1% in asymptom­atic patients [13, 1921]. However, many of these trials are now outdated with changes in treatment algorithms. In particular, preoperative digital subtraction angiography is no longer rou­tine and perioperative medical therapy is much improved.
Carotid Stenting
Quality ofLife Instruments andProms inCarotid Intervention
Denition ofQuality ofLife and Patient Reported Outcome Measures
PROMS ask patients to assess elements of their own health, QOL, and functioning [25]. The aim is to understand the impact of a treatment and its recovery, allow comparison of different patients’ outcomes with the same intervention [25]. QOL is the major element of PROMS and is dened as a patient’s perception of health as assessed in multiple domains [26, 27]. The use of QOL instruments in carotid revascularisation have been previously described [28].
One of the important considerations in QOL assessment is the type of instrument used and the measurement time points and time frame within which these assessments will be made. Previous recommendations have been provided for core outcome sets and reporting in carotid interven­tion [29, 30]. However, these documents provide very little detail on QOL measurement. Until these are specied in detail for QOL outcomes, investigators will need to use clinical judgment on the most appropriate methods of assessment.
Even though CEA is still the preferred method in most patients [17], the emergence of CAS has triggered key trials comparing CAS to CEA.CAS may be more appropriate for younger patients with favourable anatomy and symptom­atic patients at high risk of complications from CEA [22]. The SAPPHIRE [23] and CREST [16] trials, and Carotid Stenting Trialist’s Collaboration meta-analysis [15] showed CAS prevents strokes and is not inferior to CEA in highly selected circumstances. The recent European Society for Vascular Surgery guide­lines indicate that CEA should be the rst con­sideration in symptomatic patients with >50% carotid stenosis and average risk asymptomatic patients with >60% carotid stenosis and >5years life expectancy [24].
Commonly Used Quality ofLife Instruments inCarotid Intervention
QOL can be assessed by study designed ques­tionnaires, and disease-specic or generic instru­ments. These instruments assess an individual’s physical, emotional and psychological health as well as social and functional status [26, 27].
Individual study designed questionnaires are constructed by study authors as arbitrary mea­sures of QOL outcomes [3133]. Disease-specic QOL instruments are validated QOL scoring sys­tems that measure the effect of an illness or treat­ment on a specic condition [27]. Generic QOL instruments are validated QOL scoring systems
14 Quality ofLife andPatient Reported Outcome Measures Following Carotid Artery Intervention
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251
that measure QOL in a broad range of health domains and allow comparisons with other con-
Quality ofLife andPatient Reported Outcomes
ditions and reference populations [27]. Generic scoring systems used by studies in this review are Medical Outcomes Short Form 36 (SF-36) and 12 (SF-12) [34], Sickness Impact Prole (SIP) [35], Hospital Anxiety and Depression Scale (HAD) [36], Katz Index of Independence in Activities of Daily Living (ADL) [37], European Quality of Life EQ-5D Questionnaire (EQ-5D) [38], Multidimensional Index of Life Quality Questionnaire (MILQ) [39], and the World Health Organisation Quality of Life BREF (WHOQOL-BREF) [40]. These instruments are described in previous chapters.
Table 14.1 Study characteristics and quality appraisal
Original studies
Author
Patients
Sirrka [31] 84 R Male: NR, Age: 66, 1992
Study objectives: Long-term QOL and cognitive performance after CEA (CEA vs. non-operative
Martin [32] 200 R CEA Yes SF-36 Yes 83% 1998 Male: 61%, Age:
Study objectives: Short-term QOL after CEA (CEA vs. medical management in those
Vriens [44] 86 P Male: 78.6%, Age: 1998
Study design
Patient demographics
Asymptomatic: 0%, Symptomatic: 100%, Level stenosis: “signicant”
group)
65, Asymptomatic: 0%, Symptomatic: 100%, Level stenosis: >70%
Medical treatment
Male: 62%, Age: 66, Asymptomatic: 0%, Symptomatic: 100%, Level stenosis: <70%
inappropriate for CEA, CEA or medical therapy vs. general population)
65 (44–82), Asymptomatic: 34%, Symptomatic: 66%, Level stenosis: NR
There have been numerous randomised trials and meta-analyses on CEA and CAS in various sub­groups of patients [1116, 41], but these have focussed on technical outcomes of the procedure. Recent reviews have highlighted the importance of QOL outcomes [28, 42, 43]. This chapter assesses the currently available evidence. To date QOL is the primary method of PROMS.Study characteristics and a brief quality appraisal is outlined in Table14.1 and the QOL outcomes are summarised in Table14.2. This section describes the key QOL ndings.
Validated QOL instrument
No Study
Yes SIP No 81.4%
QOL instruments used
questionnaire
Follow-up method reported
No 49%
Response rateYear
(continued)
252
Table 14.1 (continued)
Original studies
Author
Patients
Study objectives: To investigate whether QOL improves after CEA (preoperative vs.
Dardik [45] 50 P Male: 78%, Age: 2001
Study objectives: Short-term QOL after CEA (preoperative vs. postoperative, postoperative vs.
Middleton [46]
2001 Male: 72.8%, Age:
Study objectives: Mid-term QOL after CEA (CEA vs. general population)
Lloyd [47] 100 P Male: 64%, Age: 2004
Study objectives: Short-term QOL and cognitive function after CEA (preoperative vs.
Diethrich [48]
2005 Male: 63%, Age:
CARESS CAS Trial Male: 60%, Age:
238 R RPAH Hospital Yes SF-36 Yes 90%
397 P CEA Yes MILQ No 48%
Study design
Patient demographics
postoperative) Does haemodynamic improvement have an impact
67.1 (49–83), Asymptomatic: 0%, Symptomatic: 100%, Level stenosis: >65%
general population)
82.4% <75, Asymptomatic: 32%, Symptomatic: 68%, Level stenosis: NR
CRGH Hospital
Male: 66.4%, Age:
69.9% <75, Asymptomatic: 32%, Symptomatic: 68%, Level stenosis: NR
Mortality rate and causes of death after CEA
69 (45–87), Asymptomatic: 13%, Symptomatic: 87%, Level stenosis: NR
postoperative)
71.4, Asymptomatic: 67%, Symptomatic: 33%, Level stenosis: 89% patients >75% stenosis
71.2, Asymptomatic: 69%, Symptomatic: 31%, Level stenosis: 94% patients >75% stenosis
Validated QOL instrument
Yes SF-36 No 100%
Yes SF-36, HAD,
QOL instruments used
EQ-5D
Follow-up method reported
Yes 92%
L. L. Shan et al.
Response rateYear
14 Quality ofLife andPatient Reported Outcome Measures Following Carotid Artery Intervention
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Table 14.1 (continued)
Original studies
Author
Patients
Study objectives: Short-term QOL after CEA and CAS (CEA vs. CAS) Abelha [49] 63 P Male: 76%, Age: 70 2008
Study objectives: Short-term QOL and independence with activities of daily living after CEA
Stolker [50] 310 RCT CEA Yes SF-36, 2010 Male: 68%, Age:
SAPHHIRE CAS Trial Male: 68%, Age:
Study objectives: Short-term QOL after CEA compared to CAS (CEA vs. CAS, preoperative vs.
Attigah [51] 102 P Male: 68.6%, Age: 2011
Study objectives: Short-term QOL and satisfaction after CEA (preoperative vs. postoperative) Cohen [52] 2502 RCT Male: 65%, Age: 2011 CREST trial
Study objectives: Short-term QOL after CEA compared to CAS (CEA vs. CAS, preoperative vs.
Kazmierski [33]
2012
102 P Male: 70.6%, Age:
Study design
Patient demographics
(44–84), Asymptomatic: 21%, Symptomatic: 79%, Level stenosis: all patients 65%
(preoperative vs. postoperative, postoperative vs. general population)
72, Asymptomatic: 72%, Symptomatic: 28%, Level stenosis: symptomatic >50%, asymptomatic >80%
72, Asymptomatic: 70%, Symptomatic: 30%, Level stenosis: symptomatic >50%, asymptomatic >80%
postoperative)
70 (42–86), Asymptomatic:
74.5%, Symptomatic:
25.5%, Level stenosis: >70%
69, Asymptomatic: 47%, Symptomatic: 53%, Level stenosis: >85% of patients >70% stenosis
postoperative)
65.8 (34–84), Asymptomatic: 0%, Symptomatic: 100%, Level stenosis: >50%
Validated QOL instrument
Yes SF-36, ADL Yes 76%
Yes HAD, EQ-5D Ye s 100%
Yes SF-36, LS Ye s 85%
Yes SIP, LS No 100%
QOL instruments used
EQ-5D, LS
Follow-up method reported
No 80%
Response rateYear
(continued)
253
254
Table 14.1 (continued)
Original studies
Author
Patients
Study objectives: Short-term QOL after CEA (preoperative vs. postoperative) Hsu [53] 61 P Male: 83%, Age: 2014
Study objectives: QOL after CAS in patients with dizziness (preoperative vs. postoperative) Kazmierski
[54] 2014
Study objectives: Short-term QOL, neurological status and disability after CEA (preoperative vs.
Yan [55] 65 P CAS Yes 2014 Male: 56%, Age:
Study objectives: Short-term QOL and cognition after CAS in elderly patients (preoperative vs.
Carta [56] 46 P CEA Yes SF-12 Yes 87% 2015 Male: 57%, Age:
Study objectives: Short-term QOL, mood, cognition after CEA compared to medical treatment
Hye [57] 53 RCT Male: 62%, Age: 2015 CREST trial
102 P Male: 71%, Age:
Study design
Patient demographics
73.3, Asymptomatic: 71%, Symptomatic: 29%, Level stenosis: symptomatic >60%, asymptomatic >80%
65.8, Asymptomatic: 0%, Symptomatic: 100%, Level stenosis: >70%
postoperative)
72.1, Asymptomatic: 0%, Symptomatic: 100%, Level stenosis: >70%
Medical treatment
Male: 48%, Age:
73.1, Asymptomatic: 0%, Symptomatic: 100%, Level stenosis: >70%
postoperative, CAS vs. medical treatment)
71.6, Asymptomatic: 69%, Symptomatic: 31%, Level stenosis: symptomatic >50%, asymptomatic >70%
Medical treatment
Male: 80%, Age:
72.1, Asymptomatic: 64%, Symptomatic: 36%, Level stenosis: symptomatic >50%, asymptomatic >70%
(preoperative vs. postoperative, CEA vs. medical treatment in those who refused surgery)
67, Asymptomatic: 43%, Symptomatic: 57%, Level stenosis: >85% of patients >70% stenosis
Validated QOL instrument
Yes SF-36, LS No 66%
Yes mRS, LS No NR
Yes SF-36, LS Ye s 98%
QOL instruments used
WHOQOL­BREF, HAM-D, HAM-A
Follow-up method reported
Yes NR
L. L. Shan et al.
Response rateYear
14 Quality ofLife andPatient Reported Outcome Measures Following Carotid Artery Intervention
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Table 14.1 (continued)
Original studies
Author
Patients
Study objectives: QOL after CEA in those who sustained cranial nerve injury
Reviews
Al-Damluji [42]
2013 Study objectives: Periprocedural safety and long-term efcacy of CEA compared to CAS Shan [28] Review Total studies: 12, Studies on QOL: 12, Total patients in studies on QOL: 4224 2015 Study objectives: QOL after CEA, QOL after CAS, QOL after CEA vs. CAS, QOL compared to
Chabowski [43]
2017 Study objectives: QOL in stroke survivors and after CEA
ADL activities of daily living, CaRESS carotid revascularization using endarterectomy or stenting systems trial, CAS carotid artery stenting, CEA carotid endarterectomy, CREST carotid revascularization endarterectomy versus stenting trial, HAD hospital anxiety and depression scale, QOL quality of life, MILQ multidimensional index of life quality, NA not applicable, NR not recorded, P prospective, R retrospective, RCT randomized control trial, SAPPHIRE stenting and angioplasty with protection in patients at high risk for endarterectomy, SF-36 medical outcomes survey short form 36 questions, SIP sickness impact prole, LS Likert scale, EQ-5D Euro-QOL 5 dimensions, mRS modied Rankin scale, HAM-D Hamilton depression rating scale, HAM-A Hamilton anxiety rating scale, WHOQOL-BREF World Health Organisation quality of life-BREF
Study design
Review Total studies: 28, Studies on QOL: 2, Total patients in studies on QOL: 2812
Review Total studies: NR, Studies on QOL: NR, Total patients in studies on QOL: NR
Patient demographics
reference populations
Validated QOL instrument
QOL instruments used
Follow-up method reported
255
Response rateYear
Table 14.2
Original studies
Author
Sirrka [31] CEA 8–11years NR NR 1992
Martin [32] CEA 1year 3% 1% 1998
Vriens [44] CEA 3months 0% 3% 1998
Quality of life results
Procedure Follow-up time
Key ndings:
Key ndings:
Key ndings:
Peri­operative mortality
QOL similar between CEA and non-operated groups at long-term follow-up Non-operative patients who had a stroke had better physical condition than those
who had CEA
SF-36 scores similar between CEA and medical therapy group at 1year across all domains
Superior improvement in self-perceived general health and treatment success after CEA compared to medical therapy.
Similar levels of anxiety over future strokes or TIAs CEA and medical groups both have worse physical health domains at 1year
compared to general population, but mental health domains are similar
No signicant change in QOL observed 3months post-op based on SIP measurement
Signicant QOL improvement after CEA limited to only patients with contralateral carotid occlusion.
Peri­operative strokeYear
(continued)