-
7/21/2019 Differential Diagnosis of Tachycardias
1/27
Diferential Diagnosis oDiferential Diagnosis o
TachycardiasTachycardias
-
7/21/2019 Differential Diagnosis of Tachycardias
2/27
Differential diagnosis of broad complex tachycardias
Criteria for the diagnosis of the presence of a
broad complex tachycardia:
QRS >120ms = Broad Complex achycardia
QRS !120ms = "arro# Complex achycardia
-
7/21/2019 Differential Diagnosis of Tachycardias
3/27
TachycardiasTachycardias
Narrow QRSNarrow QRS
Sinus tachycardiaSinus tachycardia
Atrial tachycardiaAtrial tachycardia
Atrial brillationAtrial brillation
Atrial FlutterAtrial Flutter
AVRNTAVRNTAVRTAVRT
SVTSVT
Broad QRSBroad QRS
Ventricular tachycardiaVentricular tachycardia
SVT with abnormalSVT with abnormal
conductionconduction
Bundle branch blockBundle branch block
Rate relatedRate relatedVentricular preVentricular pre
e!citatione!citation
-
7/21/2019 Differential Diagnosis of Tachycardias
4/27
Differential diagnosis of broad complex tachycardias
he rhythm strip ta$en from a single lead isgenerally
ins%fficient to ma$e a differential
diagnosis bet#een an S& #ith aberrancy
or &' ( 12 lead )C* is re+%ired for
ma$ing an acc%rate diagnosis'
-
7/21/2019 Differential Diagnosis of Tachycardias
5/27
Differential diagnosis of broad complex tachycardias
he presence of anyone of the follo#ing confirms the
diagnosis of &,
)-idence of ('&'Dissociation.'in the form ofindependent
atrial acti-ity'
/resence of f%sion beats
/resence of capt%re beats
-
7/21/2019 Differential Diagnosis of Tachycardias
6/27
AV dissociationAV dissociation
Atrio"entricular dissociation inAtrio"entricular dissociation
in
#ono#orphic "entricular tachycardia#ono#orphic "entricular
tachycardia$note % &a"es' arro&ed($note % &a"es'
arro&ed(
-
7/21/2019 Differential Diagnosis of Tachycardias
7/27
)apture beat)apture beat
)apture beat)apture beat
-
7/21/2019 Differential Diagnosis of Tachycardias
8/27
Fusion BeatFusion Beat
Fusion beatFusion beat
-
7/21/2019 Differential Diagnosis of Tachycardias
9/27
Differential diagnosis of broad complex tachycardias
n patients #ith D.' .'
03 of broad complex
tachycardias #ill be -entric%lar
in origin
-
7/21/2019 Differential Diagnosis of Tachycardias
10/27
QRS Conto%rs 4a-o%ring &entric%lar achycardia
5ellens *%lamh%sein
16716 810039 :;7:< 8:39
7 810039 171: 8639
271 8:39 1:710810039
171 810039 :7;08;39
Wagner (2001) Marriotts Practical Electrocardiography 10th
Ed
&1
&1
&
