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If your doctor says you or a loved one has bradycardia, a resting heart beat that's less than 60 beats per minute, it's only part of the diagnosis. Your doctor will also want to figure out which type it is. They may talk to you about these kinds: sinus bradycardia, sick sinus syndrome, and heart block.

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Your heart runs on electricity. A steady signal travels from your upper right chamber (atrium) to your lower chambers (ventricles). But sometimes this current gets delayed or stopped. The result: a condition called atrioventricular (AV) block or heart block. How AV Block Happens? Causes of AV block. Types of AV Block. Symptoms of AV block. How Is It Diagnosed? What Are Your Treatment Options?

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Obstructive sleep apnea is when something blocks part or all of your upper airway while you sleep. Your diaphragm and chest muscles have to work harder to open your airway and pull air into your lungs. Your breath can become very shallow, or you may even stop breathing briefly. You usually start to breathe again with a loud gasp, snort, or body jerk. You may not sleep well, but you probably won't know that it’s happening.

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Sometimes, a problem with your heart's electrical signals can make it speed up, even when you're not anxious or exercising. One type of faster-than-normal heartbeat is called supraventricular tachycardia (SVT).

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An arrhythmia is an uneven heartbeat. It means your heart is out of its usual rhythm. What Is an arrhythmia? Symptoms of arrhythmias, arrhythmia causes, arrhythmia risk factors, types of arrhythmias, diagnosis of arrhythmias, treatment of arrhythmias, complications of arrhythmias, safe driving concerns and arrhythmia prevention.

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Palpitations are perceived abnormalities of the heartbeat characterized by awareness of cardiac muscle contractions in the chest, which is further characterized by the hard, fast and/or irregular beatings of the heart.

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Atrial fibrillation is a rapid, irregularly irregular atrial rhythm. Symptoms include palpitations and sometimes weakness, effort intolerance, dyspnea, and presyncope. Atrial thrombi may form, causing a significant risk of embolic stroke. Diagnosis is by electrocardiography. Treatment involves rate control with drugs, prevention of thromboembolism with anticoagulation, and sometimes conversion to sinus rhythm by drugs or cardioversion.

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Atrioventricular (AV) block is partial or complete interruption of impulse transmission from the atria to the ventricles. The most common cause is idiopathic fibrosis and sclerosis of the conduction system. Diagnosis is by electrocardiography; symptoms and treatment depend on degree of block, but treatment, when necessary, usually involves pacing.

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Complete examination of all systems is essential to detect peripheral and systemic effects of cardiac disorders and evidence of noncardiac disorders that might affect the heart. Examination includes the following: vital signs measurement,  pulse palpation and auscultation, vein observation, chest inspection, and palpation, cardiac percussion, palpation, and auscultation, lung examination, including percussion, palpation, and auscultation, extremity and abdomen examination.

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Auscultation of the heart requires excellent hearing and the ability to distinguish subtle differences in pitch and timing. Hearing-impaired health care practitioners can use amplified stethoscopes. High-pitched sounds are best heard with the diaphragm of the stethoscope. Low-pitched sounds are best heard with the bell. Very little pressure should be exerted when using the bell. Excessive pressure converts the underlying skin into a diaphragm and eliminates very low-pitched sounds.

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