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Patient Reported Outcomes andQuality ofLife following Heart Transplantation
AlexJacobPoovathoor, JasonAli, andMariusBerman
5
Introduction
It is well-established that heart transplantation is the gold-standard treatment for eligible patients with end-stage heart failure. The survival benet over medical management and durable LVADs has been demonstrated in multiple studies [14]. The main challenge of this life-saving treatment is the availability of donor organs, leading to pro­longed waiting times on the list, often with sig­nicant deterioration of symptoms, and even demise. In the UK, 10% of non-urgent patients will die on the waiting list in 2years and only 17% will be transplanted [5]. For those that receive an organ, the average waiting time is
1.6years [5].
A. J. Poovathoor (*) University of Cambridge, Cambridge, UK
Department of Cardiothoracic Surgery, Royal Papworth Hospital NHS Foundation Trust, Cambridge, UK
J. Ali · M. Berman Department of Cardiothoracic Surgery, Royal Papworth Hospital NHS Foundation Trust, Cambridge, UK e-mail: jason.ali@nhs.net; marius.berman@nhs.net
For those who receive a heart transplant, along with prolongation in life-expectancy one should recognize a signicant improvement is heart- failure related symptoms and quality of life. The survival prognosis for heart transplanta­tion is 12.5years, and the 1-year conditional sur­vival is 14.8years, so the gap between outcomes from cardiac transplantation and natural history is notable [6]. The survival over 1 and 5years of heart transplants between 1982 and 2013 was 82% and 69%, respectively [6]. Heart transplan­tation is a remarkably successful operation, and there is a signicant improvement prognosti­cally. Not only this, death in association with heart transplantation is continually decreasing. The survival for 1-year survivors between 2002 and 2009 was 12.5 years, now increased to
14.8years [6].
However, post-transplant management is a multidisciplinary journey with the patient in the center that involves life-long pharmacological treatment, blood tests, biopsies etc., which can have an impact in the physical and mental well­being of the recipient and overall QoL. In this chapter we sought to examine QoL parameters using established tools in assessing the effect of heart transplantation against patients’ pre-trans­plant status but also against other patient groups, including LVAD recipients.
© 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_5
83
84
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A. J. Poovathoor et al.
Methods
Literature Search
A literature search was performed in the PubMed database with the following terms: ((((((((((((((((patient reported outcomes) OR (prom)) OR (quality of life)) OR (QoL)) OR (SF-
36)) OR (short form 36)) OR (HRQoL)) OR (health related quality of life)) OR (EQ5D)) OR (euroqol 5d)) OR (Minnesota Living with Heart Failure Questionnaire)) OR (MLHFQ)) OR (Kansas City Cardiomyopathy Questionnaire)) OR (KCCQ)) OR (Quality of Life Index cardiac version)) OR (WHOQOL-BREF)) AND ((((car­diac transplant) OR (heart transplant)) OR (heart failure surgery)) OR (end-stage heart failure surgery)).
Date of search: 15-12-2020.
Study Selection
Exclusion of studies that are: non- English, pae­diatric cohorts; focusing mainly on depression without a holistic approach to QoL; combining heart transplant with other organ transplants without differentiating the outcomes; and using QoL tools that are not holistic in approach.
Study Classication
From the studies we identied as eligible, we subsequently carried out classication and criti­cal appraisal based on the comparative arms as follows:
1. comparative studies: vs LVADs control group. Patients implanted with a bridge to transplant left ventricular assist device com­pared to HTx recipients. Table5.1.
2. comparative studies: vs medical therapy con- trol group. Patients stabilized on best medical therapy compared to HTx recipients. Table5.2.
3. comparative studies: vs waiting-list control group . Patients on the transplant waiting-list compared to recipients. Table5.3.
4. longitudinal studies: pre-operation and post- operation intervals. Assessing baseline qual­ity of life with heart failure, then at intervals post-operatively. Table5.4.
5. longitudinal studies: post—operation inter- vals only. Studies that focused on outcomes at post-operative intervals only. Table5.5.
6. longitudinal studies: long-term follow-up. studies that focused on outcomes in long-term survivors (dened as >5years). Table 5.6.
Refer to Fig.5.1 for a comparison of four heart­failure- specic quality of life instruments com­monly used in the selected studies.
Results
Comparative Studies
vs. LVADs
Grady etal. [7] conducted a longitudinal, multi­site study comparing paired QoL data of 40 LVAD patients at 3 months post-LVAD­implantation vs 3 months post-HTx. Patients after HTx were found to be more satised with their lives and with their health and functioning. Furthermore, an improvement in mobility, self­care ability, physical ability and overall func­tional ability was observed from 3 months post-LVAD-implantation to 3 months post- HTx. However, self-care stress and hospital/clinic­related stress were seen to be lower in the post­LVAD period.
As compared to Grady et al’s study, which used patients implanted with LVADs as a bridge­to- transplant and following them longitudinally to post-HTx, Jakovljevic etal. [8] compared the QoL in LVAD and HTx recipients using two sep­arate cohorts. This LVAD bridge-to-destination group comprised of 14 patients, and was com­pared to 12 post-HTx patients. Physical activity and QoL were assessed at 4 to 6weeks (baseline)
5 Patient Reported Outcomes andQuality ofLife following Heart Transplantation
Patients more satised with
lives overall and health and
functioning at 3months
post-HTx vs. post-LVAD
implant. Mobility, self-care
ability, physical ability and
overall functional ability
improved from 3months after
LVAD implant to 3months
after HTx. Work/school/
nancial stress lower post-HTx
LVAD implantation and HTx
increased daily physical
activity by 60% and 52%. level
of activity unchanged at 3, 6,
and 12months. QoL improved
in LVAD implantation and HTx
groups but unchanged
afterward. HTx higher activity
level vs. LVAD implantation-
associated with better QoL
vs post-LVAD implant
Best QoL in recipients; EQ-5D
scores highest in recipients
85
30±6 vs. 63±7 (6 Mo post-Tx/LVAD)
29±7 vs. 60±5 (12 Mo post-Tx/LVAD)
HRQOL
MLHFQ 39±5 vs. 57±7 (3 Mo post-Tx/LVAD)
instrument
used QoL scores (gures given as HTx vs. LVAD) Main ndings related to HRQOL
Short- and
long-term effects of
bridge to transplant
LVAD implantation
Study intent and
number of patients
United
Kingdom
Effect of Left
Ventricular Assist
and HTx on physical
Device Implantation
and Heart
Transplantation on
activity and QoL.
n=40 (+14 healthy
subjects)
Habitual Physical
Activity and Quality
of Life
Health and Functioning=0.78±0.16 vs. 0.68±0.17
(p=0.0003)
QLI Life Satisfaction=0.79±0.13 vs. 0.75±0.12 (p=0.01)
Compare QOL of
patients listed for
HTx with bridge to
transplant LVAD at
3months after
LVAD implantation
vs. 3months after
HTx. n=40
United
States of
America
Change in Quality of
Life From After Left
Ventricular Assist
Device Implantation
to After Heart
Transplantation
KCCQ domains
Symptom stability=54.7±21.6 vs. 60.9±21.7
Self-efcacy=93.4±15.0 vs. 93.8±11.1
Symptom frequency=77.1±26.3 vs. 68.5±25.3
Symptom burden=77.8±25.1 vs. 69.5±25.5
Total symptom score=77.5±25.1 vs. 69.0±24.7
Physical limitation=75.4±31.1 vs. 56.5±25.9
Clinical summary score=76.6±26.1 vs. 62.6±23.8
KCCQ
EQ-5D
QoL in patients
assessed for HTx,
listed for HTx on
medical therapy,
supported with
bridge to transplant
LVAD and patients
after HTx. n=386
United
Kingdom
Quality of life of
advanced chronic
heart failure: medical
care, mechanical
circulatory support
and transplantation
QoL=71.4±28.5 vs. 44.1±23.2
Social limitation=67.0±34.2 vs. 41.6±27.0
Overall summary score=73.0±27.2 vs. 52.6±22.0
EQ-5D index score=0.74±0.27 vs. 0.58±0.26
Jakovljevic
etal. (2014)
Table 5.1 Comparative studies: vs LVAD control group. Patients implanted with a bridge to transplant left ventricular assist device compared to HTx recipients
Study Title Country
[8]
Grady etal.
(2003)
[7]
Emin etal.
(2016)
[9]
HTx: Heart Transplant; LVAD: Left Ventricular Assist Device
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Physical health score signicantly
improved over time in all patients;
changes in mental health were minimal.
Although all patients continued to have
low HRQOL scores at the time of
follow-up, medically stable patients had
higher mental health scores and less
depressive symptoms
Highest QoL in recipients. EQ-5D scores
highest in recipients
A. J. Poovathoor et al.
QoL scores (gure given as HTx vs.
medical therapy) Main ndings related to HRQOL
IQR) vs. 46.9 (37.7–56.7 IQR)
Mental health=41.9 (38.8–51.2
IQR) vs. 49.2 (49.2–57.8 IQR)
HRQOL
instrument used
SF 12 Physical health=35.2 (32.4–44.6
Study intent and
number of patients
Comparative
effects of HTx
or medical
treatment on
HRQOL. n=77
United
States of
America
Two-year follow-up of
quality of life in
patients referred for
heart transplant
KCCQ domains
Symptom stability=54.7±21.6
vs. 33.9±23.8
Self-efcacy=93.4±15.0 vs.
79.5±18.7
Symptom frequency=77.1±26.3
KCCQ
EQ-5D
QoL in patients
assessed for
HTx, listed for
HTx on medical
therapy,
supported with
United
Kingdom
Quality of life of
advanced chronic heart
failure: medical care,
mechanical circulatory
support and
transplantation
vs. 43.5±22.5
Symptom burden=77.8±25.1
vs. 47.9±20.7
Total symptom
score=77.5±25.1 vs. 45.7±20.6
bridge to
transplant LVAD
and patients
after HTx.
n=386
Physical limitation=75.4±31.1
vs. 34.7±25.8
Clinical summary
score=76.6±26.1 vs. 40.2±22.0
QoL=71.4±28.5 vs. 24.4±20.4
Social limitation=67.0±34.2 vs.
27.3±27.2
Overall summary
score=73.0±27.2 vs. 33.3±21.1
EQ-5D index score=0.74±0.27
vs. 0.44±0.27
Study Title Country
Evangelista
etal. (2005)
Table 5.2 Comparative studies: vs medical therapy control group. Patients stabilized on best medical therapy compared to HTx recipients
[13]
Emin etal.
(2016)
[9]
5 Patient Reported Outcomes andQuality ofLife following Heart Transplantation
Psychologic adaptation, and perceived
functional capability improved in
transplant recipients. More weakness after
surgery in recipients- major symptom that
limited activities. No signicant
differences in QOL changes over time
between medical therapy group and
recipients at 41months. QOL for medical
therapy group may not be different from
recipients
daily physical activity by 60% and 52%.
level of activity unchanged at 3, 6, and
12months. QoL improved in LVAD
implantation and HTx groups but
unchanged afterward. HTx higher activity
level vs LVAD implantation- associated
with better QoL
87
QoL scores (gure given as HTx vs.
medical therapy) Main ndings related to HRQOL
HRQOL
instrument used
3
questionnaires
Study intent and
number of patients
QOL at the time
of
transplantation
evaluation and
again after
41months in
patients
stabilized with
Extended comparison
of quality of life
between stable heart
failure patients and
heart transplant
recipients
MLHFQ 39±5 vs. 74±4 LVAD implantation and HTx increased
medical therapy
and recipients.
n=31
Short- and
United
Effect of Left
long-term effects
of LVAD
implantation and
HTx on physical
activity and
Kingdom
Ventricular Assist
Device Implantation
and Heart
Transplantation on
Habitual Physical
QoL. n=40
(+14 healthy
subjects)
Activity and Quality of
Life
Study Title Country
Walden
etal. (1994)
[46]
Jakovljevic
etal. (2014)
[8]
88
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A. J. Poovathoor et al.
Table 5.3 Comparative studies: vs waiting-list control group. Patients on the transplant waiting-list compared to recipients
Study Title Country
Mantovani etal. (2017) [15]
Emin etal. (2016) [9]
Comparison of quality of life between patients on the waiting list and heart transplant recipients
Quality of life of advanced chronic heart failure: medical care, mechanical circulatory support and transplantation
Brazil Compare
United Kingdom
Study intent and number of patients
QOL between wait-listed patients and recipients. n=56
QoL in patients assessed for HTx, listed for HTx on medical therapy, supported with bridge to transplant LVAD and patients after HTx. n=386
HRQOL instrument used
SF-36 Physical functioning=9.5 vs.
KCCQ EQ-5D
QoL scores (gures given as HTx vs wait-list)
32.1
Role-physical=22.6 vs. 29.6 Bodily pain=18.2 vs. 29.1 General health=9.1 vs. 32.2 Vitality=14.9 vs. 31.1 Social functioning=17.6 vs.
30.0
Role-emotional=24.8 vs. 29.2 Mental health=24.6 vs. 29.2
KCCQ domains Symptom stability=54.7±21.6
vs. 47.8±29.5 Self- efcacy=93.4±15.0 vs.
74.2±22.2
Symptom frequency=77.1±26.3 vs.
45.5±26.8 Symptom burden=77.8±25.1 vs. 48.5±25.5
Total symptom score=77.5±25.1 vs.
47.0±24.9
Physical limitation=75.4±31.1 vs.
43.3±26.7
Clinical summary score=76.6±26.1 vs.
45.0±23.5 QoL=71.4±28.5 vs.
27.0±22.1 Social limitation=67.0±34.2 vs. 23.7±23.4
Overall summary score=73.0±27.2 vs.
35.5±21.5
EQ-5D index score=0.74±0.27 vs.
0.50±0.30
Main ndings related to HRQOL
Signicant difference between two groups in the QOL score and four dimensions. Mean rank=16.9in wait-listed patients, = 30.7in transplant recipients. Lowest scores for general health and highest scores for role- emotional in wait-listed patients. Highest scores for general health and the lowest scores for bodily pain in recipients
Best QoL in recipients. EQ-5D scores highest in patients after HTx
5 Patient Reported Outcomes andQuality ofLife following Heart Transplantation
Table 5.3 (continued)
HRQOL instrument used
MLHFQ (lower score denotes higher QoL)
SF 12 Physical health=35.2
QoL scores (gures given as HTx vs wait-list)
LHFQ total=28.0±26.4 vs.
52.3±26.1 (p=0.000) Physical=11.3±11.2 vs.
19.9±12.1 (p=0.000) Emotional=7.5±8.2 vs.
12.8±7.8 (p=0.001)
(32.4–44.6 IQR) vs. 40.4 (26.9–54.0 IQR) Mental health=47.6 (36.758.8 IQR) vs. 42.4 (38.6–53.0 IQR)
Study Title Country
Evangelista etal. (2004) [14]
Evangelista etal. (2005) [13]
Functional Status and Perceived Control Inuence Quality of Life in Female Heart Transplant Recipients
Two-year follow-up of quality of life in patients referred for heart transplant
United States of America
United States of America
Study intent and number of patients
Describe and compare QOL and psychologic well-being of recipients and waiting list candidates, correlates of QOL in female recipients. n=100
Comparative effects of surgical or medical treatment on HRQOL. n=77
89
Main ndings related to HRQOL
Overall QOL scores higher in recipients than candidates. Higher physical and emotional health for recipients compared with candidates. Functional status, depression and perceived control signicant correlates of QOL among female recipients, accounted for 49% variance in overall QOL
Physical health score signicantly improved over time in all patients, changes in mental health were minimal. Although all patients continued to have low HRQoL scores at the time of follow-up, medically stable patients had higher mental health scores and less depressive symptoms
90
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Fewer than half had good QOL, one-third
had demoralization syndrome.
Demoralization syndrome combined with
post-transplant time, age, use of
mechanical circulatory support during
hospitalization and stress status accounted
for 35.2% of PCS.Demoralization
syndrome combined with age and religion
accounted for 40.3% of MCS
A. J. Poovathoor et al.
QOL pre-HTx=3.16±1.47, post-
HTx=7.60±1.21. After HTx people
consider their physical health better.
Positive correlation between the
assessment of QoL and that of physical
and mental health
PCS=38.83±7.65 (baseline) vs.
44.54±7.93 (3 Mo) vs 45.18±7.69 (6 Mo)
vs. 48.15±7.59 (12 Mo)
MCS=48.89±9.59 (baseline) vs.
HRQOL
instrument used QoL scores Main ndings related to HRQOL
SF-12 Group 1 (<1year post-Tx)
Study intent and number
of patients
Compare different
post-transplant times
of recipients in terms
of QOL,
demoralization
Quality of life,
demoralization
syndrome and
health-related
lifestyle in cardiac
Study Title
Wu etal.
(2019)
Table 5.4 Longitudinal studies: pre-operation and post-operation intervals. Assessing baseline quality of life with heart failure, then at intervals post-operatively
[24]
49.98±7.70 (3 Mo) vs. 48.15±8.25 (6
Mo) vs. 49.27±7.58 (12 Mo)
Group 2 (1–3years post-Tx)
PCS=46.70±8.43 (baseline) vs.
46.55±8.40 (3 Mo) vs. 46.91±8.43 (6
Mo) vs. 44.62±8.67 (12 Mo)
syndrome and
health- related lifestyle,
predictors of quality of
life. n=99
transplant
recipients—a
longitudinal study in
Taiwan
MCS=46.35±8.19 (baseline) vs.
45.29±13.05 (3 Mo) vs. 48.16±8.21 (6
Mo) vs. 49.30±9.66 (12 Mo)
Group 3 (>3years post-Tx)
PCS=45.75±8.93 (baseline) vs.
45.10±9.28 (3 Mo) vs. 44.54±9.62 (6
Mo) vs. 46.73±8.43 (12 Mo)
MCS=47.92±9.44 (baseline) vs.
49.98±8.15 (3 Mo) vs. 50.93±8.87 (6
Mo) vs. 50.39±8.82 (12 Mo)
Physical=2.079±0.79 (Pre-Tx) vs.
4.10±0.39 (Post-Tx)
Mental=2.56±0.98 (Pre-Tx) vs.
3.92±0.75 (Post-Tx)
authors’
questionnaire
(Scale of 1 to
5)
Quality of life of
patients before and
after HTx, n=63
Comparative analysis
of the quality of life
for patients prior to
and after heart
transplantation
Czyżewski
etal. (2014)
[23]
5 Patient Reported Outcomes andQuality ofLife following Heart Transplantation
Correlation in the changes of perceived
HRQoL between the preoperative and
each postoperative stage. HRQoL in the
postdischarge-12th month stage reached
2.29 times preoperative scores
Progressive improvement in physical,
psychologic, and social areas post-HTx,
HRQoL stable at 6months
Large and rapid change in health status
91
(continued)
post-HTx; absence of spontaneous
improvement prior to transplant and
gradual deterioration post-transplant.
NHP scores relate closely to clinical
categorization. Pre-Tx NHP scores may
be useful prognostic indicator for post-Tx
survival
31.25±18.08 (Pre-Tx) vs. 60.00±16.04
(Post-Tx ICU transition) vs. 64.38±14.99
(1day pre-discharge) vs. 68.75±14.58 (1
Mo post-discharge) vs. 72.50±7.07 (3 Mo
post-discharge) vs. 72.50±11.65 (6 Mo
post-discharge) vs. 71.25±11.26 (12 Mo
post-discharge)
interviewed x7
HRQOL
Study intent and number
(QoL %)
instrument used QoL scores Main ndings related to HRQOL
Relationships between
the changes in the
HRQoL and working
capacity (WC),
changes in various
aspects of physical
well being related to
of patients
Changes in Health-
Related Quality of
Life and Working
Competence Before
and After Heart
HRQoL and WC in
Transplantation:
One-Year Follow-Up
in Taiwan
Physical functioning=21.92 (Pre-Tx) vs.
51.92 (3 Mo) vs. 75.00 (6 Mo) vs. 69.61
(12 Mo)
Role Limitations Due to Physical
SF 36
interview
the rst year. n=10
Evolution of HRQOL
during the rst year.
n=13
Health-Related
Quality of Life
Evolution in Patients
After Heart
Problems=0 (Pre-Tx) vs. 33.84 (3 Mo)
vs. 57.69 (6 Mo) vs. 53.84 (12 Mo)
Body Pain=77.11 (Pre-Tx) vs. 76.15 (3
Mo) vs. 91.53 (6 Mo) vs. 77.88 (12 Mo)
General Health=24.23 (Pre-Tx) vs. 29.23
Transplantation
3 Mo)
Sleep=30.71(pre-Tx) vs. 11.05 (3 Mo)
Social isolation=23.86 (pre-Tx) vs. 3.88
(3 Mo)
Physical mobility=32.29 (pre-Tx) vs.
(3 Mo) vs. 43.07 (6 Mo) vs. 77.88 (12 Mo)
Vitality=14.61 (Pre-Tx) vs. 45.76 (3 Mo)
vs. 65.84 (6 Mo) vs. 53.84 (12 Mo)
Social Functioning Role Limitations Due
to Emotional Problems=20.78 (Pre-Tx)
vs. 47.94 (3 Mo) vs. 66.66 (6 Mo) vs. 51.27
(12 Mo)
Mental Health=47.07 (Pre-Tx) vs. 60.92
(3 Mo) vs. 73.53 (6 Mo) vs. 63.69 (12 Mo)
Energy=27.21 (pre-Tx) vs. 18.00 (3 Mo)
Pain=24.65 (pre-Tx) vs. 12.25 (3 Mo)
Emotional reactions=31.22 (pre-Tx) vs.
5.90 (
NHP (mean
rank score)
Examine relationship
between the survival
and QoL. n=1036
Measuring the
effectiveness of heart
transplant
programmes: quality
of life data and their
relationship to
5.50 (3 Mo)
survival analysis
Study Title
Shih etal.
(2003)
[37]
Martín-
Rodríguez
etal. (2008)
[21]
O’Brien
etal. (1987)
[38]
92
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Negative correlation between BDI and
subgroups on SF36. Signicant
improvements noted in all subgroups on
the SF36 after the HTx
LVAD implantation and HTx increased
daily physical activity by 60% and 52%.
Physical health score signicantly
improved over time in all patients,
changes in mental health were minimal.
Although all patients continued to have
low HRQOL scores at the time of
follow-up, medically stable patients had
higher mental health scores and less
depressive symptoms
level of activity unchanged at 3, 6, and
A. J. Poovathoor et al.
12months. QoL improved in LVAD
implantation and HTx groups but
unchanged afterward. HTx higher activity
level vs. LVAD implantation—associated
with better QoL
vs. 68.52±22.65 (post-Tx)
Physical role=27.68±36.34 (pre-Tx) vs.
65.37±36.35 (post-Tx)
Bodily pain=40.15±21.62 (pre-Tx) vs.
HRQOL
instrument used QoL scores Main ndings related to HRQOL
SF-36 Physical function=35.00±25.68 (pre-Tx)
Study intent and number
of patients
Relationship between
depressive symptoms
and anxiety with QoL
and functional
capacity. n=34
The relationship
between depressive
symptoms and
anxiety and quality
of life and functional
Study Title
Karapolat
etal. (2007)
Table 5.4 (continued)
[22]
63.00±24.03 (post-Tx)
General health=40.67±19.57 (pre-Tx)
vs. 66.11±19.35 (post-Tx)
Vitality=50.00±16.76 (pre-Tx) vs.
71.67±20.05 (post-Tx)
Social function=44.63±28.12 (pre-Tx)
capacity in heart
transplant patients
vs. 71.04±31.37 (post-Tx)
Emotional role=18.49±26.67 (pre-Tx)
vs. 68.85±35.82 (post-Tx)
Mental Health=59.41±20.89 (pre-Tx)
vs. 72.30±18.31 (post-Tx)
(pre-Tx) vs. 35.2 (32.4–44.6 IQR) (post-Tx)
Mental health=47.6 (36.7–58.8 IQR)
(pre-Tx) vs. 41.9 (38.8–51.2 IQR) (post-Tx)
SF 12 Physical health=30.3 (20.1–35.8 IQR)
Comparative effects of
surgical or medical
treatment on HRQoL.
n=77
Two-year follow-up
of quality of life in
patients referred for
heart transplant
Evangelista
etal. (2005)
[13]
(6 Mo) vs. 29±7 (12 Mo)
MLHFQ 72±8 (pre-Tx) vs. 39±5 (3 Mo) vs. 30±6
Short- and long-term
effects of LVAD
implantation and HTx
on physical activity
and QoL. n=40 (+14
healthy subjects)
Transplantation on
Habitual Physical
and Heart
Activity and Quality
Effect of Left
Ventricular Assist
Device Implantation
Jakovljevic
etal. (2014)
[8]
of Life
SF 12: Short Form 12; SF 36: Short Form 36; NHP: Nottingham Health Prole; MLHFQ: Minnesota Living with Heart Failure Questionnaire; PCS: Physical Component Score;
MCS: Mental Component Score; Mo: month; Tx: transplant