Actions of Living Changes Heart Rate Essay

Arrhythmias are irregular rhythms of the heartbeat which can be fast paced or slow paced.

An untrained 22-year-old male human subject was chosen. A PT-104 pulse plethysmograph was wrapped around his dominant (right) index finger. Connected through a IXTA data acquisition unit, heart rate was monitored on LabScribe. The recordings were measured with ten seconds of leeway at the beginning and end to allow baseline pulse recovery. Digital marks labeled the time interval of the described action. First the subject’s heart rate was measured during a resting phase for twenty seconds. He was encouraged to relax and remain inactive in order to confirm an accurate baseline reading. For the apneic condition, the subject repeated this

The heart rates of participants was tested before the step test, one minute, two minutes, and three minutes after the step test was performed in this experiment. Since heart rate increases while someone is performing physical activity, it was expected that heart rates of the students would be higher than before the step

Your heart beat can affect the blood pressure if the ventricle is contracting it is high if it is dilating it is low. Blood pressure is measured I two measurements. • Systolic pressure is when the pressure is at its highest, the pressure of the heart between heart contractions. • Diastolic pressure is when the pressure is at its lowest, when your heart is resting before it pumps again.

An arrhythmia is when there is a problem with the heart rate or rhythm. During an

This is a physiological response to apnea and an increase in parasympathetic activity in the heart. Due to the presence of cold water stimuli, sympathetic activity to muscles is increased causing total peripheral resistance to increase (figure 1C). Mean arterial pressure (MAP) is controlled by TPR and CO (MAP=TPR x CO), overall, increase in TPR causes an increase in MAP. The two face immersion groups had non-statistically different response to apnea and dive. In the Air manoeuver, there was only a statistically significant decreases in CO and HR (bradycardia) (figure 1B & figure 1D). Elucidating the different physiologically response to voluntary apnea to apnea experienced during dive response.

Cardiovascular drift is the term that describes the physiological changes in heart function during prolonged exercise. When one exercises, his/her core temperature raises and in order to manage homeostasis, the body sweats to get rid of the excessive heat. Constant sweating drops the level of plasma in blood, directly leading to a decrease in the stroke volume. In order to maintain the cardiac output, the heart will need to pump faster to compensate for the lowered stroke volume. Therefore, the level of hydration can be critical to our heart rate and performance during exercise, and we are trying to discover evidence that can support this argument through this lab.

Tachycardia refers to an abnormally fast resting heart rate - usually at least 100 beats per minute. The threshold of a normal heart rate (pulse) is generally based on the person's age. Tachycardia can be dangerous; depending on how hard the heart has to work.In general, the adult resting heart beats between 60 and 100 times per minute (some doctors place the healthy limit at 90, so some of them may diagnose tachycardia at slightly lower than 100 beats per minute). When an individual has tachycardia the upper or lower chambers of the heart beat significantly faster - sometimes this happens to both chambers.

An dysrhythmia of the heart is an irregular heartbeat rhythm. Ventricular tachycardia is an dysrhythmia in which the lower chambers of the heart, the ventricles, beat unusually fast.

The cardiac cycle describes the coordinated and rhythmic series of muscular contractions associated with the normal heart beat.

Figure 1. Compared effects of breathing in air (control treatment) and a simulated dive (apnea in 10C water) on human heart rate (n=6). Bars represent the combined mean heart rate of the subjects for both treatments over each measurement period. Error bars represent 95% CI.

The heart is one of the most important organs in an organism’s body, no matter if they are aquatic, amphibian, or a mammal. This super organ works automatically, able to pump massive amounts of oxygen rich blood through the body by means of electrical impulses and the opening and closing of valves within its many layers. It is what keeps us and every other creature on this earth alive; so it is only natural for one to fear when there might be a problem with one’s heart. A cardiac arrhythmia can happen to anyone, no matter the age, race, or gender, and as such, doctors and scientist have spent years trying to better understand the heart and the way it functions so that they can try to prevent these problems and save millions of lives.

As the intensity of exercise increased, so did the rates of the heart and breathing. After a small period of rest, the heart rate and breathing rate both decreased to a point close to their resting rate. This proved the stated hypothesis. First, the hearts average resting rate was recorded to be 76 bpm. The heart is therefore transporting oxygen and removing carbon dioxide at a reasonably steady rate via the blood. During the low intensity exercise (Slow 20) the heart rate increases to 107 bpm, which further increases to 130bpm at a higher intensity level (Fast 20). The heart therefore needs to beat faster to increase the speed at which oxygen is carried to the cells and the rate at which carbon dioxide is taken away by the blood.

The heart rate is a measurement of how many times the heart beats in a minute. Physically fit people tend to have a lower heart rate and during intense exercise tend to have lower rates as well. A decrease of heart rate at both rest and at fixed intensity of sub-maximal exercise [7] occurs a few months after an exercise program is begun. One’s heart rate reflects the amount of work the heart must do to meet an increase of demands of the body when engaged in activity. Heart Rate tends to increase proportionally with intensity oxygen uptake [16].

Heart rate is a measuring system for heart. It is measured by how many times then heart beats. A normal heart rate is usually between 60-100 beats. Abnormal is if the heart rate is too high or very low. Also, if the heart beats at irregular times. Some factors that change a person's heart rate are, the body temperature. It affects the heart rate because the warmer the body gets the heart beats more quickly. This happens because the body is trying to move more blood in the body to cool it down. When the body temperature is cold it also beats after because of it trying to keep the body warmer. Blood pressure is the pressure in the circulatory system. It is measured in systolic and diastolic. Systolic meaning when the arteries of the heart contract. Diastolic means the pressure in the blood vessels. The average blood pressure is 120/80 mmHg. Abnormal blood pressure is 120-139/80 doctors call it “hypertension” meaning almost high blood pressure, this is very dangerous for the heart since it puts a lot of strain on it. Some factors of high blood pressure are, obesity and smoking. Low blood pressure is if it is lower than the average. Doctors call this “hypotension”. Some factors of low blood pressure are heart problems, blood loss, and lack of nutrients. The test that is being done is how sugars and salts affect heart rate and blood pressure. There will be one partner that has the artificial sugars and salts and the other