Electrocardiogram, ECG: Electrical Activity Of The Heartbeat

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 opens and blood is ejected. The increased pressure continues through the t peak. The ventricles are now in ESV (65ml) and the aortic valve is closed. Now the ventricles are relaxed causing pressure to fall and the cardiac cycle starts over again. This ECG reading was from a normal tracing. Keep in mind that an ECV is easy to obtain, but there are some subtleties that are very complex.

The heart rate is measured with an electrocardiogram, or ECG. This is a machine that measures the electrical impulses from the patient's heart. This is displayed on a monitor or ECG graph paper. The boxes on the graph paper measure time. Five small boxes are equal to one large box. The large box represents two-tenths of a second.

ECG is electric signal generated by the activity of the heart, and it plays critical role in heart related disease and disorder such as cardiovascular disease (CVD), pulmonary disease, and sudden cardiac arrest (SCA) \cite{huigen2002investigation,chi2010dry,refet2008biopotential, malmivuo1995bioelectromagnetism}. EMG represents the activity of skeletal muscles by electrical signal. This signal has been utilised to analyse medical abnormality, muscle activation level, and recruitment order \cite{de2002surface,fridlund1986guidelines, de1997use, merletti2009technology}. Heart rate (HR), or also known as heart pulse, represents the speed of the heartbeat \cite{allen2007photoplethysmography,shelley2007photoplethysmography}. HR has been become the

The results in the measurement of heart rate and other observations during different levels of exercise have many common trends. An example of these trends are how the average heart rate increases with the intensity, going from an average of 53 bpm during rest to a 64 bpm average during low intensity exercise, all the way up to an average of 92 bpm during high intensity exercise. Other observations include the increase of sweat and body temperature as the intensity of exercise increases, as well as the soreness in the legs (or the buildup of lactic acid) which also increases during the higher intensity exercises. These additional observations such as body temperature, lactic acid release and amount of sweat produced aren’t necessarily numerical

The heart is a vital organ that pumps oxygenated blood to the whole body by repeated rhythmic contractions, and continued heart beats are essential for the body to live. The heart is an electromechanical pump, the electrical activity of the heart acts to trigger and synchronise mechanical contractions. The heart’s natural pacemaker initiates electrical activity that spreads in the ventricles as shown in Figure 1.1 (a), which shows activation isochrones for the human ventricles [1]. The electrical activity of the heart can be recorded using electrocardiogram (ECG); Figure 1.1 (b) shows the ECG recording for the normal heart rhythm where each beat is registered as a single event.

Echocardiography (echo) is a common procedure used by medical practioners to observe a patient’s heart. Also known by the term heart ultrasound, it is a medical procedure that takes a dynamic image of the heart with sound waves. This test makes use of certain physical principles to create pictures of your heart's movement, while providing unique information as compared to what a standard ECG might produce; however, like most other medical procedures, there are risks associated with some forms of this test.

Arrhythmia is one of the diseases in which a pacemaker will be needed, but there are some different types of Arrhythmia, these include:

A 50-years-old man presents to the emergency department, in a rural area’s district hospital, with a history of central crushing chest pain radiating to the jaw, dyspnea and cold sweating for 4 hours. He has no significant past medical or recent surgical history. He has a blood pressure of 150/90 mmHg and a heart rate of 64 beats/min. His EKG at the time of admission is shown below:

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ECG stands for electrocardiogram this is simply used to record the electrical activity of the heart this is done by sticking them on the chest. This allows ECG machine to record electrical signals of the heart. ECG should monitor during surgery at all time this is to detect any changes for instance, cardiac arrest that could potentially lead to death (Harley & Hore, 2012). There is also a chance that cardiac arrhythmia could occur during anaesthesia therefore it is important to ensure that the ECG monitor is correctly placed the reason for this is because when ECG monitor is incorrectly placed the anaesthetic machine shows an abnormal sequence this includes inconsistent sounds that doesn’t have a rhythm this indicates either there something

A typical or basic EKG pattern of a cardiac cycle shows four different patterns. There is the P wave, QRS complex T wave and T wave. This cycle happens fast and it happens multiple times a day. The average resting heartbeat for an adult is 60 to 100 beats per minute.

The Medical world had many different complex cardiac myocardium information. Medical conditions dealing with the cardiac myocardium and medical tests with using electronical cardio diagrams and the electronic cardio graphs. The information helps with many different connections and functions with patient’s treatment and their progress with their care. My medical knowledge and education with the medical filed as an LPN I have learned many different perspectives and with the complex medical technology. That my patient’s medical diagnostics for their medical conditions. This information is on the heart and the EKG and the ECG structure.

Heart arrhythmia is a term that refers to a large number of conditions that are caused by abnormal electrical activity within the heart's nodes or sections.

Recording an electrocardiogram or ECG, is a procedure which is performed daily all over the United Kingdom by thousands of healthcare workers and in particular nurses (Jacobson, 2000). The way in which this procedure is performed varies from geographical location to location and occasionally even more so, between staff on the same ward (Amos, 2000). This reason stated by Amos (2000), formed the basis of my decision to choose this topic.

The electrocardiogram (EKG) is a simple test that measures the heart's electrical activity (Donahue p. 35). The most widely used screening test is the exercise EKG, or stress test.