hiltgrid.blogg.se - Clock wizard

#CLOCK WIZARD GENERATOR#
#CLOCK WIZARD SOFTWARE#

Atrio-ventricular re-entrant tachycardia (AVRT).

Children with atrial flutter and fibrillation are at risk for developing clots in the upper chambers because the flow in these chambers is slow. This rhythm can be seen in children who have had previous heart surgery involving the upper chambers. When a large area of the upper chamber is involved in a circuit pattern, atrial flutter can develop. A location or an area of the upper chambers takes over the pacemaker activity of the heart. In selected cases, a “catheter ablation” procedure can be performed to cure the arrhythmia. Medication does not cure the problem but can prevent episodes while it is being taken. The choice of medication depends on the mechanism of the fast rhythm and the patient’s response. There are many medications available for treatment of fast arrhythmias. Some infants may develop poor feeding, irritability, or pallor (unnatural paleness) associated with prolonged fast heart rhythm. In infants, fast arrhythmias are more difficult to detect as they will not complain of symptoms. Younger children may have difficulty describing this sensation and may complain of chest pain or have a general feeling of illness. Fast arrhythmias may also cause children or adolescents to pass out (syncope) or, in very rare circumstances, a cardiac arrest.

They recognize that a fast heart rate is occurring at an inappropriate time such as while at rest, doing homework, or eating dinner. In older children and adolescents, the fast heart rate is often felt as palpitations. All others are termed supraventricular tachycardia (SVT). Fast arrhythmias that originate from the lower chambers (i.e., the ventricles) are called ventricular tachycardias. This circuit may involve tissue of the upper chambers, the lower chambers, or both.īesides the mechanism of the rhythm, arrhythmias are divided based on location of their origin. Re-entry occurs from a “circuit” where electrical impulses travel in a circular way, faster than the normal pacemaker. An automatic mechanism occurs when an area of heart tissue generates electrical activity at a rate faster than normal. There are two basic mechanisms for fast heart rhythms: automatic and re-entry. What are the basic mechanisms of fast rhythms? If the heart rate exceeds this limit, a fast heart rhythm (tachycardia) exists. For each age group, normal ranges have been established. The normal heart rate varies with age and activity, decreasing with increase in age during childhood and adolescence. Abnormal locations of rhythm origin can be in the upper or lower chambers of the heart or can be a "circuit" composed of parts of the upper chambers, the lower chambers, or both. A fast heart rhythm can originate from this normal pacemaker or from other areas of the heart. The configuration file generated can be used by the Clock Programmer tool to program the device using I 2C if you are evaluating the CY27410 using the CY3679 kit, CY29412 with the CY3676 kit or CY29430 using the CY3677 kit.The normal heartbeat originates from the heart's normal pacemaker called the sinus node.

#CLOCK WIZARD SOFTWARE#

The software allows you to modify various internal settings in order for you to get the required configuration file for the working of the device. Additionally, other frequency options can be configured with the I 2C interface. Four frequencies are independently programmable on the differential output with the frequency select (FS) bits. It is field or factory programmable for any output frequency between 15 MHz and 2.1 GHz. The CY29430 is a PLL-based high-performance programmable clock synthesizer with flexible output frequency options. It is field or factory-programmable for any output frequency between 15 MHz and 2.1 GHz. The CY2941x/CY2942x is a PLL-based high-performance programmable crystal oscillator solution with flexible output frequency options. It also meets the reference clock requirements of PCIe 3.0, 10GbE and SATA 2.0.

It supports frequencies up to 700 MHz and has <0.7-ps RMS phase jitter.

It has eight outputs which can be configured as differential or single-ended, and four dedicated single-ended outputs.

#CLOCK WIZARD GENERATOR#

The ClockWizard software enables you to create the configuration file used to program CY27410, CY2941x/CY2942x and CY29430, high-performance clock generators.ĬY27410 is a 4-PLL high-performance clock generator which can generate up to twelve outputs.