How is the mode of action in beating of the heart

The heart's electrical system In the simplest terms, the heart is a pump made up of muscle tissue. Like all muscle, the heart needs a source of energy and oxygen to function. The heart's pumping action is regulated by an electrical conduction system that coordinates the contraction of the various chambers of the heart. How does the heart beat? An electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node). This is a small mass of specialized tissue located in the right upper chamber (atria) of the heart. The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions. The atria are then activated. The electrical stimulus travels down through the conduction pathways and causes the heart's ventricles to contract and pump out blood. The 2 upper chambers of the heart (atria) are stimulated first and contract for a short period of time before the 2 lower chambers of the heart (ventricles). The electrical impulse travels from the sinus node to the atrioventricular node (also called AV node). There, impulses are slowed down for a very short period, then continue down the conduction pathway via the bundle of His into the ventricles. The bundle of His divides into right and left pathways, called bundle branches, to stimulate the right and left ventricles. Normally at rest, as the electrical impulse moves through the heart, the heart contracts about 60 to 100 times a minute, depending on a person's ag...

• Healthy Living • • • • • • • • • Health Topics • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Professionals • • • • • • • • • • • • • • • About Us • • • • • • • • • • • • • • • • • • • Get Involved • • • • • • • • Ways To Give • • • • • • • • • • • • • • • • • • • CPR • • • • • • • • • • • If you've had a There are many types and combinations of drugs used to treat The following gives you a quick look at many typical cardiac medications. Your prescription may have a different name from the ones listed on this chart. Brand names commonly available in the U.S. are shown in parentheses after the generic name for each drug. *Some of the major types of commonly prescribed cardiovascular medications are summarized in this section. For your information and reference, we have included generic names as well as major trade names to help you identify what you may be taking. However, the AHA is not recommending or endorsing any specific products. If your prescription medication isn't on this list, remember that your healthcare provider and pharmacist are your best sources of information. It's important to discuss all of the drugs you take with your provider and understand their desired effects and possible side effects. Never stop taking a medication and never change your dose or frequency without first consulting the prescribing doctor. • • • • • • • • • • • (Also known as Blood Thinners.) Commonly prescribed include: • Apixaban (Eliquis) • Dabigatran (Pradaxa) • Edoxaba...

Facts You Should Know: The Human Body Quiz A heart rate that is either consistently too high or too low may be an indication of a medical problem. A condition called Calculating heart rate A person can measure their heart rate using a heart rate monitor (that is, a device that detects electrical activity in the chest or tracks the expansion and contraction of see also Resting heart rate Every time the heart beats, it pushes In general, a child’s resting heart rate slows as they age until, as a teenager, their heart rate approximates the rate occurring in that of an adult. According to the American Academy of Pediatrics, the normal resting heart rate (taking into account both sleeping and waking heart rates) among children ranges from 90 to 205 BPM in newborns, 90 to 180 BPM in infants, 80 to 140 BPM in children ages 1–2, 58 to 120 BPM in children ages 3–7, and 50 to 100 BPM in Target heart rate Target heart rate is the range of heart rates that is healthy for a person to have while engaging in moderate-intensity exercise, which improves a person’s cardiovascular health while not putting too much of a strain on the heart. There is varying guidance on how to calculate target heart rate. Generally speaking, healthy adults can calculate their maximum safe heart rate by subtracting their age from 220; for example, the maximum heart rate for a 40-year-old is 180 BPM. The U.S.

The heart's electrical system In the simplest terms, the heart is a pump made up of muscle tissue. Like all muscle, the heart needs a source of energy and oxygen to function. The heart's pumping action is regulated by an electrical conduction system that coordinates the contraction of the various chambers of the heart. How does the heart beat? An electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node). This is a small mass of specialized tissue located in the right upper chamber (atria) of the heart. The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions. The atria are then activated. The electrical stimulus travels down through the conduction pathways and causes the heart's ventricles to contract and pump out blood. The 2 upper chambers of the heart (atria) are stimulated first and contract for a short period of time before the 2 lower chambers of the heart (ventricles). The electrical impulse travels from the sinus node to the atrioventricular node (also called AV node). There, impulses are slowed down for a very short period, then continue down the conduction pathway via the bundle of His into the ventricles. The bundle of His divides into right and left pathways, called bundle branches, to stimulate the right and left ventricles. Normally at rest, as the electrical impulse moves through the heart, the heart contracts about 60 to 100 times a minute, depending on a person's ag...

• Healthy Living • • • • • • • • • Health Topics • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Professionals • • • • • • • • • • • • • • • About Us • • • • • • • • • • • • • • • • • • • Get Involved • • • • • • • • Ways To Give • • • • • • • • • • • • • • • • • • • CPR • • • • • • • • • • • If you've had a There are many types and combinations of drugs used to treat The following gives you a quick look at many typical cardiac medications. Your prescription may have a different name from the ones listed on this chart. Brand names commonly available in the U.S. are shown in parentheses after the generic name for each drug. *Some of the major types of commonly prescribed cardiovascular medications are summarized in this section. For your information and reference, we have included generic names as well as major trade names to help you identify what you may be taking. However, the AHA is not recommending or endorsing any specific products. If your prescription medication isn't on this list, remember that your healthcare provider and pharmacist are your best sources of information. It's important to discuss all of the drugs you take with your provider and understand their desired effects and possible side effects. Never stop taking a medication and never change your dose or frequency without first consulting the prescribing doctor. • • • • • • • • • • • (Also known as Blood Thinners.) Commonly prescribed include: • Apixaban (Eliquis) • Dabigatran (Pradaxa) • Edoxaba...

Facts You Should Know: The Human Body Quiz A heart rate that is either consistently too high or too low may be an indication of a medical problem. A condition called Calculating heart rate A person can measure their heart rate using a heart rate monitor (that is, a device that detects electrical activity in the chest or tracks the expansion and contraction of see also Resting heart rate Every time the heart beats, it pushes In general, a child’s resting heart rate slows as they age until, as a teenager, their heart rate approximates the rate occurring in that of an adult. According to the American Academy of Pediatrics, the normal resting heart rate (taking into account both sleeping and waking heart rates) among children ranges from 90 to 205 BPM in newborns, 90 to 180 BPM in infants, 80 to 140 BPM in children ages 1–2, 58 to 120 BPM in children ages 3–7, and 50 to 100 BPM in Target heart rate Target heart rate is the range of heart rates that is healthy for a person to have while engaging in moderate-intensity exercise, which improves a person’s cardiovascular health while not putting too much of a strain on the heart. There is varying guidance on how to calculate target heart rate. Generally speaking, healthy adults can calculate their maximum safe heart rate by subtracting their age from 220; for example, the maximum heart rate for a 40-year-old is 180 BPM. The U.S.

The heart conduction system is the network of nodes, cells and signals that controls your heartbeat. Each time your heart beats, electrical signals travel through your heart. These signals cause different parts of your heart to expand and contract. The expansion and contraction control blood flow through your heart and body. Overview What is the conduction system of the heart? Your heart’s conduction system is the network of nodes (groups of cells that can be either nerve or muscle tissue), specialized cells and electrical signals that keep your heart beating. Two types of cells control your heartbeat: • Conducting cells carry the electric signals. • Muscle cells control your heart’s contractions. Your heart (cardiac) conduction system sends the signal to start a Function What are the steps of the heart conduction pathway? Your heart is a pump that sends blood through your body. For each heartbeat, electrical signals travel through the conduction pathway of your heart. It starts when your sinoatrial (SA) node creates an excitation signal. This electrical signal is like electricity traveling through wires to an appliance in your home. The excitation signal travels to: • Your atria (top heart chambers), telling them to contract. • The atrioventricular (AV) node, delaying the signal until your atria are empty of blood. • The bundle of His (center bundle of nerve fibers), carrying the signal to the Purkinje fibers. • The Purkinje fibers to your ventricles (bottom heart chamber...

• Healthy Living • • • • • • • • • Health Topics • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Professionals • • • • • • • • • • • • • • • About Us • • • • • • • • • • • • • • • • • • • Get Involved • • • • • • • • Ways To Give • • • • • • • • • • • • • • • • • • • CPR • • • • • • • • • • • If you've had a There are many types and combinations of drugs used to treat The following gives you a quick look at many typical cardiac medications. Your prescription may have a different name from the ones listed on this chart. Brand names commonly available in the U.S. are shown in parentheses after the generic name for each drug. *Some of the major types of commonly prescribed cardiovascular medications are summarized in this section. For your information and reference, we have included generic names as well as major trade names to help you identify what you may be taking. However, the AHA is not recommending or endorsing any specific products. If your prescription medication isn't on this list, remember that your healthcare provider and pharmacist are your best sources of information. It's important to discuss all of the drugs you take with your provider and understand their desired effects and possible side effects. Never stop taking a medication and never change your dose or frequency without first consulting the prescribing doctor. • • • • • • • • • • • (Also known as Blood Thinners.) Commonly prescribed include: • Apixaban (Eliquis) • Dabigatran (Pradaxa) • Edoxaba...

The heart's electrical system In the simplest terms, the heart is a pump made up of muscle tissue. Like all muscle, the heart needs a source of energy and oxygen to function. The heart's pumping action is regulated by an electrical conduction system that coordinates the contraction of the various chambers of the heart. How does the heart beat? An electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node). This is a small mass of specialized tissue located in the right upper chamber (atria) of the heart. The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions. The atria are then activated. The electrical stimulus travels down through the conduction pathways and causes the heart's ventricles to contract and pump out blood. The 2 upper chambers of the heart (atria) are stimulated first and contract for a short period of time before the 2 lower chambers of the heart (ventricles). The electrical impulse travels from the sinus node to the atrioventricular node (also called AV node). There, impulses are slowed down for a very short period, then continue down the conduction pathway via the bundle of His into the ventricles. The bundle of His divides into right and left pathways, called bundle branches, to stimulate the right and left ventricles. Normally at rest, as the electrical impulse moves through the heart, the heart contracts about 60 to 100 times a minute, depending on a person's ag...

The heart conduction system is the network of nodes, cells and signals that controls your heartbeat. Each time your heart beats, electrical signals travel through your heart. These signals cause different parts of your heart to expand and contract. The expansion and contraction control blood flow through your heart and body. Overview What is the conduction system of the heart? Your heart’s conduction system is the network of nodes (groups of cells that can be either nerve or muscle tissue), specialized cells and electrical signals that keep your heart beating. Two types of cells control your heartbeat: • Conducting cells carry the electric signals. • Muscle cells control your heart’s contractions. Your heart (cardiac) conduction system sends the signal to start a Function What are the steps of the heart conduction pathway? Your heart is a pump that sends blood through your body. For each heartbeat, electrical signals travel through the conduction pathway of your heart. It starts when your sinoatrial (SA) node creates an excitation signal. This electrical signal is like electricity traveling through wires to an appliance in your home. The excitation signal travels to: • Your atria (top heart chambers), telling them to contract. • The atrioventricular (AV) node, delaying the signal until your atria are empty of blood. • The bundle of His (center bundle of nerve fibers), carrying the signal to the Purkinje fibers. • The Purkinje fibers to your ventricles (bottom heart chamber...