DIFFERENTIATION OF REGULAR, NARROW-QRS COMPLEX TACHYCARDIA TYPES BY UTILIZING THE STANDARD 12-LEAD ELECTROCARDIOGRAM

Volume 11 , Issue 4 , December 2021 , Pages 461-468

Authors

Mohammad A. Shaikhani 1 ; Hemin Sadeeq Mohammed 2 ; Ammar Al-Hamdi 1

1 College of Medicine, University of Sulaimani, Kurdistan Region, Iraq.

2 Directorate of Health, Ministry of Health, Kurdistan Region, Iraq.

DOI logo 10.17656/jsmc.10332

Keywords

Abstract

Background
Supraventricular tachycardia comprises 80% of regular tachycardia that present to the emergency rooms and
cardiology clinics. It is of many mechanisms and electrocardiography features. In a high percentage of cases,
it occurs in the structurally-normal heart. Epidemiologically it has been discovered that it is more widespread
in females than in males.
Objectives
Electrocardiography (ECG) criteria help differentiate the types of Supraventricular tachycardia (SVT) and
predict the underlying mechanism. For example, the patient with short R.P. and long P.R. types is more
suggestive of atrioventricular nodal reentrant tachycardia (AVNRT), where ablation therapy is more successful
than in atrial tachycardia and atrioventricular reentrant tachycardia (AVRT)
Differentiating between AVNRT, AVRT, and atrial tachycardia is extremely significant regarding the acute
termination by medications; Adenosine and Calcium-channel blockers (CCBs) are found more effective in
atrioventricular reentrant tachycardia, CCBs should be avoided in long R.P. and short P.R.
Patients and Methods
A retrospective cross-sectional study was conducted between December 2016 and February 2018. This study
included patients who visited the emergency room with a narrow-QRS-complex tachycardia.
Results
Eighty-five patients with regular narrow-QRS-complex tachycardia were included. The mean ± S.D. of the
participants-age was 46.29 years ±12.71, 56 cases (65.9%) were females, and 29 (34.1%) were males. The
mean ± S.D. of the disease duration of the condition was 5.07±5.52 years, and a frequency of 3.8 attacks per 6
months, and a mean duration of each episode was approximately 80 minutes for each episode. Regarding the
symptomatology of tachycardia, almost all patients had symptoms of palpitation, 11.8% had presyncope, and
4.7% had syncope.
Conclusion
Atrioventricular nodal reentries tachycardia (slow/fast) are the most common in our study. AVRNT was found
more prevalent in females than males. Atrioventricular reentry tachycardia was found in males more than
females in our study.

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