161
6054147819011156112
Electrocardiogram12055960128861241872492883364054685295756466847548258729331042
waves,22815960128101164234297350386
intervals,2702596012838108148210256326389427481516
and3254596012861132201
segments3491596012854117186296356426465520
(Fig.4050596012846124162233268
17):4352596012870141189226
P-wave851839012878125226288358421
–1306839012870
atrial1412839012862101148186249286
depolarization1734839012870133202272311373420459521584622660731800
PQ(R)-interval8511080012878179226319366413452521561623669740802841
–17261080012870
depolarization18671080012870132201271311373419458521582621659730800
of27011080012870117
atriae28531080012863102147187249310
&319910800128109
AV-node334210800128102203250320391461523
(atrioventricular39011080012846109147194233303372435504542590629690761799862909
conduction)48451080012862131201271341404442481551620669
QRS85113210128101194273
–11581321012870
ventricular12991321012870133202241288326389458497559606
depolarization19401321012870132201271310373419457520582620660729799
ST-segment8511563012878164210265327398507567637677
–15631563012870
electrical16681563012862102164226265312350411474513
quiescence22151563012870141179242295358421490552615
(interval2866156301284785155194257303372434473
between33751563012870131170272334396465
ventricular38761563012870132202240287325388458497560605
depolarization45161563012870133202273311374421459521584622661731800
and8511805012862133202
ventricular10891805012870132202241287326389458497559606
repolarization)17301805012847109178248287349396435498560598636707777825
QT-interval85120460128101187233272342382444490561623662
-15482046012847
depolarization16292046012870133202272311373420458521583621661730800
and24642046012863133202
repolarization27022046012847109178248287350396434497559597637706777
of35172046012869116
the36682046012838108171
ventricles38732046012870133202241287326389427490543
U-wave85122880128101148249311381444
–13302288012870
part14342288012870133180218
of16872288012871117
ventriculae18382288012870133202241288327389459497560622
repolarization,24962288012846109178247287348395434497558597636706776812
corresponds33442288012862132180226288342412482552622676
to40552288012839109
period41992288012870133179218287358
of45912288012870117
time4743228801283978187247
when502522880128102171234304
ventricles8512529012870133202241289327389427490545
are14312529012861108170
most163625290128109177232272
vulnerable19432529012870140179249312358421490528591
to25692529012839109
developing27122529012870133203265304373443482552623
serious33702529012853116163201271341395
ventricular38002529012871133202241288327389459497560607
arrhythmias.44412529012862109156226296334404514551613668704
Figure8515231012878117188257305367
17.12525231012870140175
Electrocardiogram146252310128861241872492873344044665295756446847548238709331042
waves,253752310128101163233296350386
intervals,29585231012838109148210257326389428482518
and35115231012861130201
segments.37485231012853115185294354424464519554
The12055714012886155218
exercise14585714012899168231278340378433495
electrocardiogram198857140128991372002623003484174785415876586967678378849451054
(ECG)30755714012883169262364410
is35205714012876131
a36865714012899
well-validated382157140128138199237277326396459497535606669707769838
procedure469557140128106152222285347416486533596
for53265714012883152200
establishing8515957012862117157218289327366420490530599669
the15555957012873142205
diagnosis179559570128102142203274343414468506562
and23925957012896165234
prognosis266259570128103149219289359429483523577
of327359570128104151
coronary34595957012896165212281352414460530
heart402359570128103166228275314
disease,437359570128102141195258320374437472
as48805957012895148
well506459570128134196235274
as53735957012895148
assessing8516198012862117172234289343382452521
exercise14086198012862132194241303341396459
capacity19026198012862123192255317355395465
(ie,2401619801284685148183
functional26196198012847117186249287326396466528567
capacity).32226198012861123193256317356395466510546
The8516439012886155218
exercise11046439012865134196243306344399460
ECG16016439012886179281
indirectly19166439012841111180220267328391430468539
detects24886439012872135174237298337391
myocardial291764390128109178246309371418488527590629
ischemia,3581643901284094157229292401438500536
which415364390128102171211274343
is4531643901284195
the46626439012839110173
physiologic48696439012872142212265304375414483554592655
consequence8516680012862133202257320389459521591653716
of16026680012879126
a17626680012873
mismatch188166800128109145200310370409472542
between24596680012879142181283344406476
myocardial298066800128109178246310373419490528591629
oxygen36446680012880150221289352421
delivery41016680012879142181219289352397468
(coronary46026680012857119190237307377440486556
blood51926680012880120190259329
flow)851692301284786156258304
and11906923012863132201
myocardial142769230128109178246309371418488528590628
oxygen20906923012870140211280342413
demand25376923012870133242302372443
(myocardial30156923012847156225295357420466536575637676
work).372669230128102170217287335370
Treadmill12057164012886132194257327437473513552
and179371640128104174243
cycle207271640128104174235274337
ergometers244471640128105152222292401461500563610664
are314371640128105152214
the33917164012882152214
most363971640128152220275315
commonly398971640128105175284392460531570641
used466371640128113168230300
dynamic499971640128111182250313422459522
exercise8517405012862133195242305343397459
testing134574050128116179232271310380449
devices.183074050128146209278318380442496532
These239774050128162233295350413
tests284574050128114177230270324
are320374050128139186248
used348674050128147201264334
to385674050128114184
reveal407674050128123184254316377416
latent452874050128115178216279348387
coronary495174050128137207255324393456503573
insufficiency,8517646012839110164233281327366428467530599662732765
the16517646012839110172
signs1858764601285593163232287
of21797646012871118
which233276460128101171209272341
can27087646012863125194
be29377646012871133
detected31047646012870133171234296334397467
on36057646012870140
the37807646012839109171
ECG39867646012886179280
after43017646012862109148210256
exercise.45927646012863133196242304343397459494