Author Archives: Paul Older

Comparison of Methods for Determining Aerobic Exercise Intensity Using Heart Rate in Acute Leukemia Patients Prior to Induction Chemotherapy

Story, Christina; Bryant, Ashley Leak; Phillips, Brett;
Bailey, Charlotte; Shields, Edgar W.; Battaglini, Claudio.

Biological Research for Nursing, July 2016, Vol. 18 Issue: Number 4 p432-438, 7p;

Abstract: Introduction:  Cardiopulmonary exercise testing (CPET), the
gold standard of cardiopulmonary evaluation, is used to determine
VO2 levels at different aerobic exercise training intensities; however,
it may not be feasible to conduct CPET in all clinical settings.

Aims:
To compare the heart rate reserve (HRR) and percent of 220-age methods
for prescribing cycle ergometry exercise intensity using heart rate
(HR) against the HRs obtained during a CPET in adults undergoing
treatment for acute leukemia (AL).Methods:  In this exploratory study,
part of a larger randomized controlled trial, 14 adults with AL
completed CPET on a cycle ergometer with indirect calorimetry within 96
hr of admission to a cancer hospital to determine VO2peakand HR
corresponding to low (40% VO2peak), moderate (60% VO2peak), and high
(75% VO2peak) exercise intensities. Analyses of variance were used to
compare estimated HR for each intensity level using the HRR and percent
of 220-age methods with HR determined via VO2peak.Results:  HR
corresponding to low-intensity exercise differed significantly across
all three methods (p≤ .05). No significant differences were observed
between HR estimated via the percent of 220-age method and determined
via VO2peakat moderate (100 ± 8 and 113 ± 24 bpm, p= .122) or high
intensities (125 ± 10 and 123 ± 25 bpm, p= .994).

Conclusion:  In adults
with AL, HR-based methods for defining aerobic exercise intensities
should be used with caution. At low intensity, neither should be used,
while at moderate and high intensities, the percent of 220-age equation
might serve as an adequate substitute for CPET.

The impact of cardiopulmonary exercise testing on patients over the age of 80 undergoing elective colorectal cancer surgery

Chan, K. E.; Pathak, S.; Smart, N. J.; Batchelor, N.; Daniels, I. R..

Colorectal Disease, June 2016, Vol. 18 Issue: Number 6 p578-585, 8p;

Abstract:
Advanced age and occult cardiorespiratory disease are associated with
increased morbidity and mortality following surgery. Cardiopulmonary
exercise testing (CPET) may allow the identification of high‐risk
patients and facilitate planned postoperative critical care support.
The aim of this study was to determine whether preoperative CPETin
patients aged over 80 undergoing elective colorectal cancer resection
was associated with improved outcome. All patients aged 80 years and
above undergoing elective colorectal cancer resection between 1 March
2011 and 1 September 2013 were retrospectively analysed. Referral for
CPET testing was at the discretion of the operating surgeon.
Postoperative critical care unit (CCU) admission was based upon the
CPETresults. Ninety‐four patients were identified, of whom 48 underwent
CPETtesting. The CPET group were significantly older than the
non‐CPETgroup (85 vs83 years, P= 0.04) and were more likely to have a
planned admission to CCU postoperatively (P< 0.0001). Despite the
increased use of CCU resources, the overall CCU length of stay (LOS) in
the CPET group did not differ from the non‐CPETgroup, but the
non‐CPET group had a higher proportion of Level‐3 care. There were no
differences in the incidence of unplanned CCU admission between the
CPET and the non‐CPETgroup (P= 0.23). There were no differences in
overall LOS between the two groups (P= 0.42). There was no difference in
mortality (P= 0.11), overall complications (P= 0.53) or severe
complications (P= 0.3). Preoperative CPET testing in patients aged over
80 undergoing elective colorectal cancer resection allows
identification of higher‐risk patients and mitigation of risk by
preemptive admission to a CCU. This stratification allows equivalent
results to be achieved in high‐ and low‐risk elderly patients
undergoing colorectal surgery.

A 31-day time to surgery compliant exercise training programme improves aerobic health in the elderly

Boereboom, C.; Phillips, B.;
Williams, J.; Lund, J..

Techniques in Coloproctology, June 2016, Vol.
20 Issue: Number 6 p375-382, 8p;

Abstract: Over 41,000 people were
diagnosed with colorectal cancer (CRC) in the UK in 2011. The incidence
of CRC increases with age. Many elderly patients undergo surgery for
CRC, the only curative treatment. Such patients are exposed to risks,
which increase with age and reduced physical fitness. Endurance-based
exercise training programmes can improve physical fitness, but such
programmes do not comply with the UK, National Cancer Action Team
31-day time-to-treatment target. High-intensity interval training (HIT)
can improve physical performance within 2–4 weeks, but few studies have
shown HIT to be effective in elderly individuals, and those who do
employ programmes longer than 31 days. Therefore, we investigated
whether HIT could improve cardiorespiratory fitness in elderly
volunteers, age-matched to a CRC population, within 31 days.
This observational cohort study recruited 21 healthy elderly
participants (8 male and 13 female; age 67 years (range 62–73 years))
who undertook cardiopulmonary exercise testing before and after
completing 12 sessions of HIT within a 31-day period.
Peak oxygen consumption (VO2peak) (23.9 ± 4.7 vs. 26.2 ± 5.4 ml/kg/min,
p= 0.0014) and oxygen consumption at anaerobic threshold (17.86 ± 4.45
vs. 20.21 ± 4.11 ml/kg/min, p= 0.008) increased after HIT.
It is possible to improve cardiorespiratory fitness in 31 days in
individuals of comparable age to those presenting for CRC surgery.

Cardiopulmonary Exercise Testing as a Tool for Diagnosing Pulmonary Hypertension in Patients with Dilated Cardiomyopathy

Hirashiki, Akihiro; Kondo, Takahisa; Okumura, Takahiro; Kamimura, Yoshihiro;
Nakano, Yoshihisa; Fukaya, Kenji; Sawamura, Akinori; Morimoto, Ryota;
Adachi, Shiro; Takeshita, Kyosuke; Murohara, Toyoaki.

Annals of Noninvasive Electrocardiology, May 2016, Vol. 21 Issue: Number 3
p263-271, 9p;

Abstract: Recently, it has become increasingly recognized
that pulmonary hypertension (PH) is a particularly threatening result
of left‐sided heart disease. However, there have been few
investigations of the impact of cardiopulmonary exercise testing (CPX)
variables on PH in dilated cardiomyopathy (DCM). We evaluated the
usefulness of crucial CPX variables for detecting elevated pulmonary
arterial pressure (PAP) in patients with DCM. Ninety subjects with DCM
underwent cardiac catheterization and CPX at our hospital. Receiver
operator characteristic (ROC) analysis was performed to assess the
ability of CPX variables to distinguish between the presence and
absence of PH. Overall mean values were: mean PAP (mPAP), 18.0 ± 9.6
mmHg; plasma brain natriuretic peptide, 233 ± 295 pg/mL; and left
ventricular ejection fraction, 30.2 ± 11.0%. Patients were allocated to
one of two groups on the basis of mean PAP, namely DCM without PH [mean
PAP (mPAP) <25 mmHg; n= 75] and DCM with PH (mPAP ≥25 mmHg; n= 15). A
cutoff achieved percentage of predicted peak VO2(%PPeak VO2) of 52.5%
was the best predictor of an mPAP ≥25 mmHg in the ROC analysis (area
under curve: 0.911). In the multivariate analysis, %PPeak VO2was the
only significant independent predictor of PH (Wald 6.52, odds ratio
0.892, 95% CI 0.818–0.974; P = 0.011). %PPeak VO2was strongly
associated with the presence of PH in patients with DCM. Taken
together, these findings indicate that CPX variables could be important
for diagnosing PH in patients with DCM.

Case report: Subjective loss of performance after pulmonary embolism in an athlete- beyond normal values.

Dumitrescu D, Gerhardt F, Viethen T, Schmidt M, Mayer E, Rosenkranz S.

BMC Pulm Med. 2016;16:21.

BACKGROUND: Chronic thromboembolic pulmonary hypertension (CTEPH) is a progressive disease. For patients with operable CTEPH, there is a clear recommendation for surgical removal of persistent thrombi by pulmonary endarterectomy (PEA). However, without the presence of PH, therapeutic management of chronic thromboembolic disease (CTED) is challenging – especially in highly trained subjects exceeding predicted values of maximal exercise capacity.

CASE PRESENTATION: A 43-year-old male athlete reported with progressive exercise limitation since 8 months. Six months earlier, pulmonary embolism had occurred, and was treated since with oral anticoagulation. A pulmonary ventilation/perfusion scan showed severe ventilation/perfusion mismatch: chest CT and pulmonary angiography revealed bilateral wall-adherent thrombotic material, but pulmonary hemodynamics were completely normal. His peak oxygen uptake exceeded predicted values, however exercise ventilatory efficiency was abnormal, compared to a matching athlete. After thoroughly discussing therapeutic options with the patient, he successfully underwent pulmonary endarterectomy at an expert center. Five and twelve months after surgery, his maximal exercise capacity and ventilatory efficiency profoundly improved beyond preoperative values, and his subjective exercise tolerance had returned to normal.
CONCLUSIONS: Significant CTED may be present without relevant pathologic changes in pulmonary hemodynamics at rest. Reaching normal values of maximal exercise capacity does not exclude pulmonary vascular disease in highly trained subjects. More data are needed to evaluate the risk-/benefit ratio of PEA in patients with CTED and normal pulmonary hemodynamics. A thorough discussion with the patient as well as shared decision making regarding therapy are mandatory. Cardiopulmonary exercise testing may add important clinical information in the non-invasive diagnostic evaluation at baseline and during follow-up.

Cardiopulmonary exercise testing in a patient with a permanent tracheostomy

Tran, Steven; Krige, Anton.

Journal of Clinical Anesthesia, November 2016, Vol. 34 Issue: Number 1 p270-271, 2p;
Abstract: The benefits of cardiopulmonary exercise testing have been
well established. Certain patient groups present challenges for
conducting such a test. We were presented with a patient with a
permanent tracheostomy at the preoperative assessment clinic. We
describe our technique in overcoming the problem of connecting him to
the testing machine, as this is normally done with the aid of a
tight-fitting face mask. We used a cuffed tracheostomy tube together
with some widely available tubing from theaters to connect the patient
to the gas analyzer. The test was only stopped because of excessive
secretions from the patient, and we had already established enough data
to tell us that the patient was fit enough to proceed to surgery. As
more patients present with tracheostomies, we feel that this case would
be a useful reference in managing and assessing such patients.

2016 focused update: clinical recommendations for cardiopulmonary exercise testing data assessment in specific patient populations.

Guazzi M, Arena R, Halle M, Piepoli MF, Myers J, Lavie CJ

Eur Heart J. 2016. May 2

Abstract
In the past several decades, cardiopulmonary exercise testing (CPX) has seen an exponential increase in its evidence base. The growing volume of evidence in support of CPX has precipitated the release of numerous scientific statements by societies and associations. In 2012, the European Association for Cardiovascular Prevention & Rehabilitation and the American Heart Association developed a joint document with the primary intent of redefining CPX analysis and reporting in a way that would streamline test interpretation and increase clinical application. Specifically, the 2012 joint scientific statement on CPX conceptualized an easy-to-use, clinically meaningful analysis based on evidence-vetted variables in color-coded algorithms; single-page algorithms were successfully developed for each proposed test indication. Because of an abundance of new CPX research in recent years and a reassessment of the current algorithms in light of the body of evidence, a focused update to the 2012 scientific statement is now warranted. The purposes of this update are to confirm algorithms included in the initial scientific statement not requiring revision, to propose revisions to algorithms included in the initial scientific statement, to propose new algorithms based on emerging scientific evidence, to further clarify the application of oxygen consumption at ventilatory threshold, to describe CPX variables with an emerging scientific evidence base, to describe the synergistic value of combining CPX with other assessments, to discuss personnel considerations for CPX laboratories, and to provide recommendations for future CPX research.

Cardiorespiratory fitness and sports activities in children and adolescents with solitary functioning kidney

Tancredi, Giancarlo;  Lambiase, Caterina; Favoriti, Alessandra; Ricupito, Francesca; Paoli,
Sara; Duse, Marzia; De Castro, Giovanna; Zicari, Anna; Vitaliti,  Giovanna; Falsaperla, Raffaele; Lubrano, Riccardo.

Italian Journal of Pediatrics, December 2016, Vol. 42 Issue: Number 1 p1-7, 7p;

Abstract:
An increasing number of children with chronic disease require a
complete medical examination to be able to practice physical activity.
Particularly children with solitary functioning kidney (SFK) need an
accurate functional evaluation to perform sports activities safely. The
aim of our study was to evaluate the influence of regular physical
activity on the cardiorespiratory function of children with solitary
functioning kidney.  Twenty-nine patients with
congenital SFK, mean age 13.9 ± 5.0 years, and 36 controls (C), mean
age 13.8 ± 3.7 years, underwent a cardiorespiratory assessment with
spirometry and maximal cardiopulmonary exercise testing. All subjects
were divided in two groups: sedentary (S) and trained (T) patients, by
means of a standardized questionnaire about their weekly physical
activity.   We found that mean values of maximal oxygen
consumption (VO2max) and exercise time (ET) were higher in T subjects
than in S subjects. Particularly SFK-T presented mean values of VO2max
similar to C-T and significantly higher than C-S (SFK-T: 44.7 ± 6.3 vs
C-S: 37.8 ± 3.7 ml/min/kg; p< 0.0008). We also found significantly
higher mean values of ET (minutes) in minutes in SFK-T than C-S
subjects (SFK-T: 12.9 ± 1.6 vs C-S: 10.8 ± 2.5 min; p<0.02).
Our study showed that regular moderate/high level of physical
activity improve aerobic capacity (VO2max) and exercise tolerance in
congenital SFK patients without increasing the risks for cardiovascular
accidents and accordingly sports activities should be strongly
encouraged in SFK patients to maximize health benefits.

Unexplained exertional dyspnea caused by low ventricular filling pressures: results from clinical invasive cardiopulmonary exercise testing

Pulmonary Circulation, March 2016, Vol. 6 Issue: Number 1
p55-62, 8p;

Abstract: To determine whether low ventricular filling
pressures are a clinically relevant etiology of unexplained dyspnea on
exertion, a database of 619 consecutive, clinically indicated invasive
cardiopulmonary exercise tests (iCPETs) was reviewed to identify
patients with low maximum aerobic capacity (V̇o2max) due to inadequate
peak cardiac output (Qtmax) with normal biventricular ejection
fractions and without pulmonary hypertension (impaired: n= 49, V̇o2max
= 53% predicted [interquartile range (IQR): 47%–64%], Qtmax = 72%
predicted [62%–76%]). These were compared to patients with a normal
exercise response (normal: n= 28, V̇o2max = 86% predicted [84%–97%],
Qtmax = 108% predicted [97%–115%]). Before exercise, all patients
received up to 2 L of intravenous normal saline to target an upright
pulmonary capillary wedge pressure (PCWP) of ≥5 mmHg. Despite this
treatment, biventricular filling pressures at peak exercise were lower
in the impaired group than in the normal group (right atrial pressure
[RAP]: 6 [IQR: 5–8] vs. 9 [7–10] mmHg, P= 0.004; PCWP: 12 [10–16] vs.
17 [14–19] mmHg, P< 0.001), associated with decreased stroke volume
(SV) augmentation with exercise (+13 ± 10 [standard deviation (SD)] vs.
+18 ± 10 mL/m2, P= 0.014). A review of hemodynamic data from 23
patients with low RAP on an initial iCPET who underwent a second iCPET
after saline infusion (2.0 ± 0.5 L) demonstrated that 16 of 23 patients
responded with increases in Qtmax ([+24% predicted [IQR: 14%–34%]),
V̇o2max (+10% predicted [7%–12%]), and maximum SV (+26% ± 17% [SD]).
These data suggest that inadequate ventricular filling related to low
venous pressure is a clinically relevant cause of exercise
intolerance.