ECG interpretation traditionally starts with an assessment of the P-wave. TheP-wavereflects atrial depolarization (activation). ThePR intervalis the distance between the onset of the P-wave to the onset of the QRS complex. The PR interval is assessed in order to determine whether impulse conducti...
frontal plane QRS axisheart vectorneutral planenormal ECGpositive hemisphereprecordial planeSummary The neutral plane divides the space around the heart into two halves. The half along the positive side of the lead axis is the positive hemisphere. Any resultant heart vector in that hemisphere has a...
An apparently normal ECG is defined by the following [30]: 1) heart rate between 55 and 100 bpm; 2) presence of P waves in all leads, with normal morphology; 3) presence of a QRS complex following each P wave; 4) PR interval between 0.12 to 0.20 seconds; 5) QRS duration ≤ 0.12...
It is a normal ECG, with a normal ventricular depolarization sequence and normal APD heterogeneity. It is concordant in most leads and has a QRS-T angle of 70°. This is well below the upper normal value of 105°.25 View article Chapter Angina Encyclopedia of Heart Diseases Book2006, ...
Fill in the blanks: In an ECG under normal conditions, the duration of the QRS complex is less than ___ second, or ___ small squares. The Ventricles of the Heart: The ventricles refer to the bottom two chambers of the heart. The right...
Wavelet Based QRS Complex Detection of ECG Signal The Electrocardiogram (ECG) is a sensitive diagnostic tool that is used to detect various cardiovascular diseases by measuring and recording the electrical activity of the heart in exquisite detail. A wide range of heart condition is det... S Mukh...
Fill in the blanks: In an ECG under normal conditions, the duration of the QRS complex is less than___ second, or ___ small squares. Fill in the blank. The pulmonary vascular system is a ___(high/low)-resistance system. In...
ECG showed that peaked T-waves and widening of the QRS complex. The patient was treated intravenously with calcium gluconate, sodium bicarbonate, and insulin (glucose 50% solution) and ECG became normal. The most likely reason for ECG alteration in this patient is A、 Hypocalcemia B、...
included in the critical value of ECG.By analyzing the ECG characteristics of 4patients with sudden death,we found that although the causes of the patients were different,there were transient prolongation of QT interval after premature contraction in 12lead ECG,followed by malignant arrhythmia or ...
Asymptomatic Wolff鈥揚arkinson鈥揥hite syndrome: incidental ECG diagnosis and a review of literature regarding current treatment A 19-year-old male presented with periorbital cellulitis responsive to intravenous antibiotics. A routine ECG on admission showed slurred upstroke of the QRS complexes consiste...