2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC),
Год журнала:
2023,
Номер
unknown, С. 1 - 4
Опубликована: Июль 24, 2023
Cardiorespiratory
phase
synchronization
(CRPS)
is
defined
as
the
stable
occurrence
of
n
heartbeats
within
m
respiratory
cycles
according
to
n:m
locking
ratio
(PLR).
Since
CRPS
an
intermittent
phenomenon
where
different
regimes
and
epochs
unlocking
can
alternate
same
recording,
index
ideally
should
assess
all
potential
PLRs
present
in
recording.
However,
traditional
approaches
compute
(SYNC%)
over
a
single
PLR,
namely
one
that
maximizes
CRPS.
In
work,
we
tested
assessing
total
percentage
coupled
inspiratory
onset
regardless
(SYNC%
sum
)
compared
its
efficacy
more
SYNC%.
Analysis
was
carried
out
cohort
25
male
amateur
cyclists
(age:
20-40
yrs)
undergoing
muscle
training
(IMT)
at
intensities.
assessed
before
after
IMT
protocol,
during
experimental
condition
known
modify
CRPS,
active
standing
(STAND).
We
found
moderate
intensity
60%
maximal
pressure,
SYNC%
could
detect
decrease
following
STAND.
This
result
not
visible
using
Therefore,
stress
significant
presence
athletes
importance
accounting
for
multiple
analysis.Clinical
Relevance—
Multiple
contribute
significantly
cardiorespiratory
control
especially
intensity.
Frontiers in Network Physiology,
Год журнала:
2024,
Номер
4
Опубликована: Авг. 8, 2024
Homeostatic
regulation
plays
a
fundamental
role
in
maintenance
of
multicellular
life.
At
different
scales
and
biological
systems,
this
principle
allows
better
understanding
organization.
Consequently,
growing
interest
studying
cause-effect
relations
between
physiological
systems
has
emerged,
such
as
the
fields
cardiovascular
cardiorespiratory
regulations.
For
this,
mathematical
approaches
Granger
causality
(GC)
were
applied
to
field
physiology
last
20
years,
overcoming
limitations
previous
offering
new
perspectives
cardiac,
vascular
respiratory
homeostatic
interactions.
In
clinical
practice,
continuous
recording
data
hospitalized
patients
or
by
telemetry
opened
applicability
for
these
with
potential
early
diagnostic
prognostic
information.
review,
we
describe
theoretical
background
based
on
linear
GC
time
frequency
domains
detect
couplings
series
RR
intervals,
blood
pressure
respiration.
Interestingly,
tools
help
contribution
negative
feedback
anticipatory
feedforward
mechanisms
controls.
We
also
experimental
results
tools,
consolidating
evidence
coupling
studies.
Finally,
propose
allowing
complete
interactions
well
interplay
brain
high
integrative
view
regulation.
Entropy,
Год журнала:
2023,
Номер
25(7), С. 1072 - 1072
Опубликована: Июль 17, 2023
The
properties
of
cardio-respiratory
coupling
(CRC)
are
affected
by
various
pathological
conditions
related
to
the
cardiovascular
and/or
respiratory
systems.
In
heart
failure,
one
most
common
cardiac
conditions,
degree
CRC
changes
primarily
depend
on
type
heart-rhythm
alterations.
this
work,
we
investigated
in
heart-failure
patients,
applying
measures
from
information
theory,
i.e.,
Granger
Causality
(GC),
Transfer
Entropy
(TE)
and
Cross
(CE),
quantify
directed
causality
between
(RR
interval)
(Resp)
time
series.
Patients
were
divided
into
three
groups
depending
their
rhythm
(sinus
presence
low/high
number
ventricular
extrasystoles)
studied
also
after
resynchronization
therapy
(CRT),
distinguishing
responders
non-responders
therapy.
information-theoretic
analysis
bidirectional
interactions
HF
patients
revealed
strong
effect
nonlinear
components
RR
(high
Resp
series
(respiratory
sinus
arrhythmia)
as
well
causal
interactions.
We
showed
that
GC
a
linear
model
measure
is
not
sensitive
both
only
free
TE
CE
may
them.
CRT
mainly
exhibit
unchanged
asymmetry
values,
with
statistically
significant
dominance
flow
over
opposite
Resp,
before
CRT.
was
Our
results
indicate
success
corresponding
transfer
signal
quantified
at
baseline
measurements,
which
could
contribute
better
selection
for
Journal of Personalized Medicine,
Год журнала:
2023,
Номер
13(9), С. 1391 - 1391
Опубликована: Сен. 18, 2023
Individuals
diagnosed
with
systemic
arterial
hypertension
(SAH)
are
considered
risk
groups
for
COVID-19
severity.
This
study
assessed
differences
in
cardiac
autonomic
function
(CAF)
and
functional
capacity
(FC)
SAH
individuals
without
infection
compared
to
post-COVID-19.
Participants
comprised
40
aged
31
80
years
old,
grouped
as
(G1;
n
=
21)
(G2;
19).
CAF
was
via
heart
rate
variability
(HRV),
measuring
R-R
intervals
during
a
10-min
supine
period.
Four
HRV
indices
were
analyzed
through
symbolic
analysis:
0V%,
1V%,
2LV%,
2UV%.
FC
assessment
performed
by
6-min
walk
test
(6MWT).
G1
G2
showed
no
significant
terms
of
age,
anthropometric
parameters,
clinical
presentation,
medication
use.
exhibited
superior
6MWT
performance,
covering
more
distance
(522
±
78
vs.
465
59
m,
p
<
0.05).
Specifically,
demonstrated
moderate
positive
correlation
between
the
2LV%
index
(r
0.58;
Shorter
walking
distances
observed
However,
did
not
find
impaired
post-COVID-19
those
without.
suggests
that
while
impacted
FC,
remained
relatively
stable
this
population.
Journal of Applied Physiology,
Год журнала:
2023,
Номер
135(5), С. 1199 - 1212
Опубликована: Сен. 28, 2023
We
compare
CRC,
i.e.,
the
reciprocal
interaction
between
cardiac
and
respiratory
systems,
healthy
pregnant
nonpregnant
women
for
first
time.
Although
CRC
is
present
in
both
groups,
reduced
during
pregnancy;
there
less
synchronization
maternal
activity
a
smaller
response
heart
rate
to
inhalations
exhalations.
Stratifying
this
analysis
by
sleep
stages
reveals
that
differences
are
most
prominent
deep
sleep.
Biology,
Год журнала:
2023,
Номер
12(3), С. 457 - 457
Опубликована: Март 16, 2023
As
differential
physiological
responses
to
hypoxic
exercise
between
adults
and
children
remain
poorly
understood,
we
aimed
comprehensively
characterise
cardiorespiratory
muscle
oxygenation
submaximal
maximal
in
normobaric
hypoxia
the
two
groups.
Following
familiarisation,
fifteen
(Age
=
9
±
1
years)
22
2
completed
graded
cycling
sessions
exhaustion
a
randomized
single-blind
manner
normoxia
(NOR;
FiO2
20.9)
(HYP;
13.0)
exercises
conditions.
Age-specific
workload
increments
were
25
W·3
min-1
for
40
adults.
Gas
exchange
vastus
lateralis
parameters
measured
continuously
via
metabolic
cart
near-infrared
spectroscopy,
respectively.
Hypoxia
provoked
significant
decreases
power
output
PMAX
(children
29%;
16%
(F
39.3;
p
<
0.01))
at
gas
threshold
10%;
adults:18%
8.08;
both
Comparable
changes
noted
most
respiratory
similar
outputs
Children,
however,
demonstrated,
lower
PETCO2
throughout
test
during
maintenance
of
V˙CO2
output.
These
data
indicate
that,
while
acute
are
comparable
adults,
there
exist
age-related
select
parameters.
Applied Sciences,
Год журнала:
2024,
Номер
14(12), С. 5170 - 5170
Опубликована: Июнь 14, 2024
Background:
Understanding
the
responses
of
cardio
and
respiratory
systems
during
exercise,
as
well
their
coupling
in
post-exercise
recovery,
is
important
for
prescription
exercise
programs
physically
recreative
subjects.
Aim:
In
this
work,
we
aimed
to
set
up
an
adjusted
experiment
evaluate
relations
changes
parameters
obtained
from
analysis
cardiac
signals
under
three
physiological
conditions:
relaxation,
recovery.
Material
Methods:
Simultaneously
recorded
ECG
(RR
intervals)
signal
bicycle
ergometry
until
submaximal
heart
rate
(HR),
recovery
10
healthy
men
were
analyzed.
The
included
consecutive
phases
3
min
duration
with
a
constant
workload.
Parasympathetic
control
(RMSSD),
breathing
frequency
(BF),
cycle
amplitude
(RCA)
calculated.
Anthropometric
data
also
collected.
Results:
Based
on
time
series
analysis,
our
results
show
that:
(1)
increase
HR
was
related
reduction
variability
RMSSD,
while
BF
RCA,
(2)
RCA
significantly
decreased,
RMSSD
had
biphasic
response.
multiple
linear
regressions
showed
that
averaged
HR,
segments
determined
by
several
calculated
collected
parameters.
Conclusions:
RR
interval
conditions
relaxation
along
anthropometric
data,
contributed
complexity
cardiopulmonary
after
males.
Salud Ciencia y Tecnología,
Год журнала:
2024,
Номер
5, С. 1110 - 1110
Опубликована: Ноя. 7, 2024
Introduction:
This
study
examined
the
effects
of
Body
Mass
Index
(BMI)
on
Cardiorespiratory
Capacity
(CRC)
and
explored
relationship
between
CRC
Academic
Performance
(AP)
among
female
medical
ex-students
at
Prince
Sattam
bin
Abdul
Aziz
University
(PSAU).
Understanding
these
associations
could
highlight
role
physical
fitness
in
academic
success.Methods:
A
sample
150
ex-students,
aged
23.3±0.6
years,
was
categorized
into
normal
weight
(BMI
18.5–24.9
kg/m²)
overweight
25–29.9
groups.
BMI
calculated
to
determine
status,
assessed
using
20-m
shuttle
run
test
(VO2max),
AP
evaluated
through
grades
(AG)
abilities
(AA)
Spanish
Test
Educational
Abilities.
Statistical
analyses
included
independent
t-tests
Pearson’s
correlation.Results:
Normal-weight
participants
demonstrated
significantly
higher
(VO2max
=
55.3
±4.9
mL.kg⁻¹.min⁻¹)
than
(50.8
±4.2
mL.kg⁻¹.min⁻¹,
p=0.03).
Additionally,
normal-weight
scored
both
AA
(58.82
±9.7
vs.
59.64
±10.04,
p=0.04)
AG
(3.4
±0.6
3.7
±0.5,
p=0.032).
negatively
correlated
with
(r
-0.20,
p=0.024),
while
positively
0.18,
p=0.015)
0.24,
p=0.043).Conclusions:
Higher
associated
better
performance,
increased
lower
CRC.
The
findings
suggest
that
promoting
may
be
beneficial
for
success
students
PSAU.
Journal of Clinical Medicine,
Год журнала:
2024,
Номер
13(23), С. 7353 - 7353
Опубликована: Дек. 2, 2024
This
study
aimed
to
evaluate
the
accuracy
of
machine
learning
(ML)
techniques
in
classifying
pediatric
individuals-cardiological
patients,
healthy
participants,
and
athletes-based
on
cardiorespiratory
features
from
short-term
static
measurements.
It
also
examined
impact
coupling
(CRC)-related
(from
causal
information
domains)
modeling
identify
a
preferred
feature
set
that
could
be
further
explored
for
specialized
tasks,
such
as
monitoring
training
progress
or
diagnosing
health
conditions.