Category Archives: ECG

High pass filter settings for surface vs intracardiac electrogram

Posted on April 23, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

High pass filters allow only frequencies above the set limit to pass through and hence eliminate components below a particular frequency. For surface ECG, the high pass filter [..]

ECG, Electrophysiology

S5 lead for enhancing atrial activity

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

S5 lead for enhancing atrial activity and can be taken in the following configuration: Right arm electrode is kept on the manubrium sternum, left arm electrode on the [..]

ECG

Left anterior hemiblock (LAHB)

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

Left anterior hemiblock (LAHB) is manifest as rS complexes in inferior leads (II, III and aVF) causing left axis deviation in the absence of other causes of left [..]

ECG

ECG Findings in Atrial pacing

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

Each P wave is preceded by a sharp pacing spike, indicating atrial pacing with regular pacing and capture. The P wave morphology is different from the usual sinus [..]

ECG

ECG settings

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

Recording paper speed is usually set to 25 millimeters per second. Higher speed recordings may be taken on demand at 50 millimeters per second. Much higher speed settings [..]

ECG

ECG findings in ventricular septal defect (VSD)

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

ECG is normal with small ventricular septal defects. Left atrial enlargement may be noted in moderately restrictive VSDs and in those with large left to right shunts. Left [..]

ECG

Accelerated Idioventricular Rhythm

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

Accelerated Idioventricular Rhythm Accelerated Idioventricular Rhythm (AIVR) is a ventricular rhythm originating from the Bundle of His, the Purkinje system or the ventricular myocytes. It can be diagnosed [..]

ECG

Cardiology MCQ: ECG in myocarditis may show all except

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

ECG in myocarditis may show all except: a) LBBB (left bundle branch block) b) Increase in QRS voltage c) Ventricular tachycardia (VT) d) Ventricular fibrillation (VF) Answer: b) [..]

Cardiology MCQ, ECG

Complete heart block – narrow QRS

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

Complete heart block – narrow QRS Click on the image for a larger view The tracing shows regular QRS complexes with a ventricular rate 42/min, regular P waves [..]

ECG

Tricuspid atresia – ECG

Posted on April 22, 2012 by Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin | Permalink 0

Tricuspid atresia – ECG Click on the image for a larger view Right atrial overload is manifest as tall P waves in lead II and left ventricular hypertrophy [..]

ECG