QRS complex

rhythm strip which occurs at the bottom of the tracing (lead II and V1). The labels of the waves indicate a particular action on the heart. P waves represent atrial depolarization or atrial contraction. The QRS complex indicates ventricular depolarization. While QRS is normally seen not ever complex has Q (negative deflection), R (positive

downward deflection after the P wave. It may be present and it can be absent in a normal ECG. The Q wave represents the depolarization of the interventricular septum. Never to be considered abnormal if it is missing from any particular lead.The QRS complex is a name for the combination of three of the graphical deflections seen on a typical electrocardiogram. The Q wave is usually the central and most visually obvious part of the tracing. The Q wave corresponds to the depolarization of the right

diseases. In order to avoid erroneous conclusions, it is of utmost importance that all the features of ECG waveform are extracted accurately and only sinus rhythms are present in the ECG Signal. Significant features of the ECG include the P wave, the QRS Complex, and the T wave. Determining the position of P wave and T wave is a complicated task due to low amplitude. In this paper simple Low pass differentiation (LPD) based method is proposed for estimation of P and T wave. Locating all the features accurately

As shown in Figure 1, the P wave is a result of atrial depolarization. The QRS complex is a result of ventricular depolarization, and thus ventricular contraction, as well as atrial repolarization simultaneously. The T wave represents repolarization of ventricles and thus relaxation. The delay between the P wave and the QRS complex is known as the PQ interval or the PR interval. During this interval, the atria contract and begin to relax, and the ventricles contract at the end of this delay (VanPutte

A simple approach of ANN based ECG beats classification Abstract— The automatic processing of ECG for classification of heartbeat is presented in this paper. This work gives ability to the classifier to classify the beats to one of the four classes as recommended by ANSI/AAMI EC57:1998 standard. The beats are normal, ventricular, supraventricular and fusion. The data obtained from MIT-BIH database. Six hundred beats have chosen from each class. The accuracy, sensitivity, specificity and predictivity

Purpose The purpose of this experiment was to become familiar with the electrocardiograph to help us determine the heart electrical activity. As well as, to observe how exercise and different body positions(conditions) can affect the activity of the heart. Introduction Trained professionals can look at the EKG tracing and determine if the heart is normal or if the heart is abnormal. “An ECG records the electrical activity of the heart. The heart produces tiny electrical impulses which spread through

At the latter end of the p-q interval, atrial contraction occurs forcing additional blood into the ventricles. At the beginning of the QRS interval on an ECG reading, the mitral valve closes and the ventricles are at EDV (135ml). During the QRS interval, ventricular contraction occurs increasing the pressure in the ventricle and the aorta. When the pressure continues in the ventricle exceeds the pressure in the arteries, the aortic valve

Patient care technicians (PCT’s), formally known as nursing assistants, are the backbone to any nursing department. They create rapport with the patients and family members, as well as the nursing and medical staff. Some of the tasks PCT’s are responsible for include: obtaining and recording vital signs, collecting and labeling specimens, blood glucose specimen, and obtaining electrocardiograms (ECG). All these tasks are important and critical in an emergency. PCT’s designated to work in medical

Hyperkalemia is a common electrolyte imbalance characterized by elevated serum potassium. Hyperkalemia is defined as serum potassium concentrations greater than 5.5 mmol/L (normal range is 3.5 to 5.0 mmol/L). In the body, ninety-eight percent of potassium is intracellular, and the 2 % left is extracellular which is needed for nerve conduction and muscle contraction. For this reason, extracellular potassium concentration is tightly regulated through renal potassium excretion. Up to 90% of dietary

.1 Explain the ECG complex waveform pattern (PQRST) The ECG waveform allows us to monitor the electrical activity of the heart and how the mechanical side of it is functioning. At the beginning of the ECG wave form is the P complex which is when the depolarisation of the atrial cells and when the SA (Sino atrial) node induces an electric wave that travels throughout the heart to cause the muscle cells to contract. After the P wave there is the PR interval, it is a flat line as the ventricles in the