Heart beats per minute during heart attack

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Heart Beats Per Minute During a Heart Attack

Normal Heart Rate and Variations

The human heart typically beats between 60 to 100 times per minute (bpm) under normal conditions. This rate can vary based on several factors, including physical activity, emotional state, and overall health . The heart's rhythm is regulated by pacemaker cells that generate electrical impulses, ensuring the heart pumps blood effectively throughout the body .

Heart Rate During Heart Failure

In cases of heart failure, the heart's ability to pump blood efficiently is compromised. This often results in an increased pulse rate as the body attempts to maintain adequate circulation. Despite the increased pulse rate, the overall output per beat may decrease, leading to a slower circulation of blood . This condition underscores the importance of monitoring heart rate as a critical indicator of heart health.

Tachycardia and Heart Attack Risk

Tachycardia, defined as a heart rate exceeding 100 bpm, is a significant risk factor for heart attacks. During an episode of paroxysmal tachycardia, heart rates can soar up to 180 bpm without immediate myocardial contractility issues. However, when the heart rate reaches 190 bpm, myocardial relaxation is suppressed, and at rates above 200 bpm, both myocardial relaxation and contraction are adversely affected . These disruptions can precipitate severe hemodynamic disturbances, increasing the risk of a heart attack.

Heart Rate as a Mortality Predictor in Acute Myocardial Infarction

Research has shown that a heart rate greater than 80 bpm is a strong predictor of mortality in patients experiencing an acute myocardial infarction (AMI). In a study involving patients with anterior wall AMI, over 75% had heart rates exceeding 80 bpm upon admission. Higher heart rates were significantly associated with fatal outcomes, making it a crucial independent risk factor for morbidity and mortality in these patients .

Cardiac Pacing and Arrhythmia Management

For individuals with irregular heartbeats, such as those experiencing bradycardia (heart rate less than 60 bpm) or tachycardia, cardiac pacing devices can be lifesaving. These devices help regulate the heartbeat, reducing the risk of heart attacks associated with uncontrolled arrhythmias . Effective management of arrhythmias is essential in preventing heart attacks and improving patient outcomes.

Conclusion

Monitoring heart rate is vital in assessing the risk and managing heart attacks. Elevated heart rates, particularly those exceeding 80 bpm, are significant predictors of adverse outcomes in heart attack patients. Understanding these dynamics can aid in early detection and intervention, potentially saving lives.

Sources and full results

Most relevant research papers on this topic

Pre-Heart Attack Alarm System

This heart rate measuring system can detect abnormal heartbeats and alert the user before reaching the heart attack threshold, potentially saving their life.

2022·

0citations

·Farheen Shaikh

THE OUTPUT OF THE HEART PER BEAT IN HEART DISEASE

In heart failure, the output per beat decreases, leading to a slower circulation of blood due to a greater relative decrease in blood volume passing through the body.

1925·

5citations

·I. M. Rabinowitch

[Changes in the myocardial contractility of the left ventricle and in the central hemodynamic indices during the onset and termination of a paroxysmal tachycardia attack].

During paroxysmal tachycardia attacks, three types of myocardial contractility and central hemodynamic response are identified, with elevated inotropism controlling disturbances at up to 180 beats/min, and the Frank-Starling mechanism for higher heart rates.

1986·

0citations

·V. Pavlov et al.

Cardiac pacing and arrhythmia management.

Cardiac pacing and arrhythmia management can help prevent heart attacks and improve overall health by regulating abnormal heartbeats.

2012·

0citations

·CliniCal PRiVilEGE et al.

When heart goes "BOOM" to fast. Heart rate greater than 80 as mortality predictor in acute myocardial infarction.

Higher heart rates (over 80 beats per minute) are a major, independent predictor of mortality in patients with acute myocardial infarction.

Observational Study

2013·

11citations

·G. Davidović et al.

Need for a revision of the normal limits of resting heart rate.

The current definition of sinus tachycardia should be revised to include a heart rate below 100 bpm, as it is associated with an increased risk of cardiovascular and noncardiovascular diseases.

Highly Cited

1999·

145citations

·P. Palatini

A simple bedside test of 1-minute heart rate variability during deep breathing as a prognostic index after myocardial infarction.

A simple bedside deep breathing test of heart rate variability can effectively predict all-cause mortality and sudden death in patients after a myocardial infarction.

Observational StudyHighly Cited

1999·

104citations

·Amos Katz et al.

Embedded based automatic heart attack detector and intimator

This work developed an automatic heart attack detector and intimator, which accurately detects and informs caretakers of patients with abnormal pulse rates, potentially saving lives in a short time.

2017·

4citations

·D. Selvathi et al.

Resting heart rate: what is normal?

Healthy resting heart rate values in adults remain unclear, with no established recommendation for optimal values due to the lack of consistent evidence and the potential for adverse outcomes.

Rigorous Journal

2018·

41citations

·D. Nanchen

In vitro Studies of Single Isolated Beating Heart Cells

Isolated rat heart cells exhibit periodic contractions similar to a whole beating heart, with their rate of beating affected by cardiac drugs and metabolic substrates and inhibitors.

Highly Cited

1960·

177citations

·I. Harary et al.

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