Supraventricular Tachycardia

Supraventricular tachycardia or SVT is a heart condition where the sufferer’s heart beats very fast for reasons such as exercise, high fever, caffeine or stress. For the majority of people who have supraventricular tachycardia, the heart still works as normal where it pumps blood across the body. During an episode of supraventricular tachycardia, the heart's electrical system doesn't work properly, causing the heart to beat very fast. The heart will beat at least 100 beats per minute and may reach up to 300 beats per minute. After medical treatment or treatment of its own, the heart will usually return to a normal rate of around 60 to 100 beats per minute. Supraventricular Tachycardia may start suddenly and then end suddenly, and you may not

Tachycardia: Tachycardia typically refers to a heart rate that exceeds the normal range for a resting heart rate. When the heart beats rapidly, the heart pumps less efficiently and provides less blood flow to the body and the heart. The rapid heartbeat increases the workload and oxygen demand of the heart. Problems will occur with the heart as tachycardia persists over time. The heart is maintaining less oxygen, which will lead to an MI due to death of the myocardial cells. Patient will start to have angina because of this. Tachycardia is noted in many diseases and disorder like: fever endocarditis, anemia, HTN, pericarditis, abnormal heart impulses, anxiety, older age, sleep apnea, COPD, electrolyte imbalances, and many more.

Sinus bradycardia is defined as a heart rate of less than 60bpm in conjunction with normal sinus rhythm. A bradyarrhythmia, on the other hand has a disturbance in cardiac conduction with rate of less then 60bpm (Swift, 2013). Intrinsic and extrinsic etiologies contribute to bradycardia. Intrinsic causes relate to abnormalities in the conduction system, where extrinsic causes include: increase vagal tone, electrolyte imbalance, hypoxia, hypothermia and hypothyroidism (Swift, 2013).

At a large scope, Bradycardia is a slower than normal heart rate. On average, a heart rate of 60 to 100 beats per minute is normal. However, if your heart rate is less than 60 beats per minute, it is slower than normal. A slower heart rate is either an indication of a healthy heart, since athletic individuals usually acquire a heart rate less than 60. On the other hand, it can also be an issue with the heart’s electrical system.

The patient, Meriem Haile has been complaining of chest pains along with many other symptoms. She had cardiac catheterization, coil occlusion of PDA, done at the age of 16, for congenital defect. Now she has been diagnosed with SVT (supraventricular tachycardia), occurring 8% of the time. She complains of headaches that come after any physical activity, such as going up stairs. She used to be able to run cross country, but now stopped doing any exercise due to the recurring headaches. She also complains of experiencing blackout when standing up from a sitting position.

Prolonged tachycardia - may impair subendocardial blood flow and increase myocardial oxygen consumption; both may ultimately contribute

Electrical circuits inside the heart starts with the Sinus Node. Nodes are clumps of tissue that help flow the electrical circuit. The sinus node can be found in the top right corner in the right atrium and is the natural "Pacemaker" for your heart. Going away from the Sinus Node, the electricity then goes to the AV node. AV stands for Atrial Ventricular so it is called the Atrioventricular Node. How the AV node is vital to your heart is that it is the gate for the electrical circuit to go from the Atriums down to the Ventricles. The AV Node makes a delay maker that opens the Tricuspid valve to let blood fill in the Ventricles. In a short notice, the AV Node then closes the Tricuspid valve so no more blood fills in the Ventricles and lets the Electrical circuit go through and lets the blood then move on. Repeating and Repeating goes this cycle over and over

Using a criteria of a resting heart rate >100 bpm and an average heart rate of >90 bpm on 24-hour Holter monitoring, Still et al., estimated the prevalence of IST in a middle-aged population of men and women. The IST prevalence was 1.2% (7 of 604 patients) [2], including both symptomatic and asymptomatic patients. IST has also been reported in older population. [5] Although, IST is believed to be a chronic condition, long-term complications are few. IST has been associated with tachycardia-induced cardiomyopathy in isolated cases [6][7] and no mortality has been yet reported.

Another group of cells that act as a pacemaker for the heart is the sinoatrial node, which sends out action potentials that contract the ventricles and spreads to the atrioventricular node to lead to the contraction of the atrium. For the following lab, two techniques where utilized to examine the physiology of the heart an electrocardiograph and blood pressure test. The electrocardiograph was to test the heart rate and examine the depolarization and repolarization of the heart using the QRS complex. The blood pressure test was to see the differences in blood pressure in different scenarios based on the Korotkoff sounds. Overall, it is important to understand the general physiology of the heart, blood pressure, and electrocardiograph because it is a key component to being alive and if it does not function properly or efficiently if can result in

A 65-year-old man with ischemic cardiomyopathy (left ventricular ejection fraction <20%) and ventricular tachycardia was treated with a left ventricular assist device (LVAD) (HeartWare, Framingham, MA) as a bridge to transplant and biventricular implantable cardioverter/defibrillator (ICD; Boston Scientific, Natick, MA). The patient was admitted after he experienced multiple discharges of his ICD. A review of the ICD’s memory showed multiple occurrences of symptomatic non-sustained ventricular tachycardia (NSVT). The patient was started on mexiletene, but continued to have symptomatic episodes of VT. Ultimately, the patient required a continuous infusion of amiodarone to control the arrhythmia. The patient was discharged after being transitioned to an oral regimen of amiodarone and mexiletene. He was readmitted two days later with complaints of burning

The natural history of SSA is not well documented, most likely due to the fact that it’s rarely diagnosed before death [5]. Typically it presents with symptoms and signs of biventricular cardiac failure

psychiatrically, it is called Takotsubo cardiomyopathy and in layman’s term, it is known as the

The heart is a muscular pump about the size of a fist. This muscle is continuously pumping blood to the circulatory system at a rate on average of 100,000 times a day. Arrhythmia’s can cause an abnormal rhythm to this rate because of a change in the heart’s electrical system. These arrhythmias can either cause the heart to beat too slowly, bradycardia, or tachycardia, where the heart beats too fast. Supraventricular Tachycardia (SVT) is one specific form of tachycardia. When a person develops SVT it causes the heart tissue to develop activity similar to a pacemaker in the upper chambers, or the region above the ventricles (AHA, 2015). This produces an abnormally fast heartbeat. Understanding this condition is

Dr. Smith had ordered The ECG due to Mr. Adam complains about chest pain and pain radiating to his left arm and back. The ECG supports Mr. Adam’s diagnosis of MI because according to his ECG result, the ST segment does not look normal and it is raised or elevated. The ST segment is the time between the end of the QRS complex and the start of the T wave which represents the period of zero potential between ventricular depolarization and repolarization. The ST segment is used as baseline reference by both the PQ and TP segments. The PQ and the TP are diastolic potentials.

But the reference range is between 60 bpm (bradycardia) – 100 bpm (tachycardia) for aged people.