bradycardia
Abnormally slow pulse
Bradycardia is an abnormally slow heart rate, typically defined as fewer than sixty beats per minute.
The term is medical but appears in general health discussions: The medication can cause bradycardia.
Athletes often have naturally low resting heart rates that technically qualify as bradycardia but indicate fitness rather than illness.
Abnormal cardiac rhythm
- sinus nodeHeart's natural pacemaker
- pacemakerDevice regulating heartbeat
- heart blockDisrupted cardiac electrical conduction
- vagus nerveMajor parasympathetic cranial pathway
atrium · ventricle · P-wave · atropine · heart rhythm · sinus rhythm
Unsteady, spinning sensation
- syncopeTemporary loss of consciousness
- fatigueWeariness from prolonged exertion
- lightheadednessSensation of near-fainting
- shortness of breathDifficulty inhaling enough air
confusion · chest pain · weakness · fainting · hypotension · pallor · cold extremities
Device regulating heartbeat
- atropineAnticholinergic alkaloid medication
- dopamineReward-linked neural messenger
- epinephrineAdrenal stress hormone
Insufficient thyroid hormone production
- beta-blockersHeart rate reducers
- digoxinCardiac glycoside from foxglove
- electrolyte imbalanceAbnormal blood mineral levels
- sleep apneaDisorder of interrupted breathing
hypoxia · hypothermia · Lyme disease · aging · congenital defect · myocardial infarction
Exercise to sustain prolonged effort
- cyclistOne who pedals
- resting heart rateIdle cardiac rhythm
- cardiovascular fitnessHeart and lung efficiency
- aerobic conditioningExercise improving oxygen-using capacity
arrhythmia
Abnormal cardiac rhythm
- sinus nodeHeart's natural pacemaker
- pacemakerDevice regulating heartbeat
- heart blockDisrupted cardiac electrical conduction
vagus nerve · atrium · ventricle · P-wave · atropine · heart rhythm · sinus rhythm
dizziness
Unsteady, spinning sensation
- syncopeTemporary loss of consciousness
- fatigueWeariness from prolonged exertion
- lightheadednessSensation of near-fainting
shortness of breath · confusion · chest pain · weakness · fainting · hypotension · pallor · cold extremities
pacemaker
Device regulating heartbeat
- atropineAnticholinergic alkaloid medication
- dopamineReward-linked neural messenger
- epinephrineAdrenal stress hormone
hypothyroidism
Insufficient thyroid hormone production
- beta-blockersHeart rate reducers
- digoxinCardiac glycoside from foxglove
- electrolyte imbalanceAbnormal blood mineral levels
sleep apnea · hypoxia · hypothermia · Lyme disease · aging · congenital defect · myocardial infarction
endurance training
Exercise to sustain prolonged effort
- cyclistOne who pedals
- resting heart rateIdle cardiac rhythm
- cardiovascular fitnessHeart and lung efficiency
- medicinedoctor, doctors, hospital, medicine, surgery
- symptomsfever, headache, pain, nausea, rash
- cardiologyheart attack, heart failure, heart rate, heartbeat, heart valves
- circulationblood, circulation, arteries, veins, bloodstream
- disordersADHD, disorder, anxiety, dysfunction, autism
- drug effectsanalgesia, allergic reaction, stimulation, vasodilation, vasoconstriction
bradycardiatachycardia
Excessively fast pulse
racing heart · palpitations · atrial fibrillation · fast heartbeat
cardiac, cardiologist, cardiology, tachycardia, cardia, echocardiogram, electrocardiogram, echocardiography, pericardium