This study examined the effects of very low calorie diets (800 kcal/day) on cardiac repolarization by measuring QT intervals from electrocardiograms in 29 healthy obese patients over 7 weeks. The researchers found QT interval prolongation in 20 patients by the 7th week, with 12 patients showing moderate prolongation. Low-energy diets were associated with acquired long QT syndrome and represent an important risk factor for potentially lethal arrhythmias like torsade de pointes due to repolarization abnormalities such as prolonged QT intervals. Close medical supervision with ECG monitoring is important for patients on low-energy diets.
2014 AHA/ACC Guideline for the Management of Patients With Non–ST-Elevation Acute Coronary Syndromes: Executive Summary
Circulation. published online September 23, 2014
Hospital Readmission of Heart Failure Patients And Its Precipitated Factors a...Han Naung Tun
Hypertension is one of the most prevalent modifiable risk factor for the development of heart failure (HF). Chronic heart failure (CHF) is the most common cause of readmission for patients in worldwide
2014 AHA/ACC Guideline for the Management of Patients With Non–ST-Elevation Acute Coronary Syndromes: Executive Summary
Circulation. published online September 23, 2014
Hospital Readmission of Heart Failure Patients And Its Precipitated Factors a...Han Naung Tun
Hypertension is one of the most prevalent modifiable risk factor for the development of heart failure (HF). Chronic heart failure (CHF) is the most common cause of readmission for patients in worldwide
CPR with ECLS vs conventional CPR in IHCASun Yai-Cheng
Cardiopulmonary Resuscitation with Assisted Extracorporeal Life-Support versus Conventional Cardiopulmonary Resuscitation in Adults with In-Hospital Cardiac Arrest
Lancet 2008; 372:554-561
Exercise tolerance testing (also known as exercise testing or exercise stress testing) is used routinely in evaluating patients who present with chest pain, in patients who have chest pain on exertion, and in patients with known ischaemic heart disease.
Post-Cardiac Arrest Syndrome:
Epidemiology, Pathophysiology, Treatment, and Prognostication
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Circulation. 2008;118:2452-2483
ACC/AHA 2007 Guidelines for UA & NSTEMISun Yai-Cheng
ACC/AHA 2007 Guidelines for the management of Patients with Unstable Angina/Non-ST-Elevation Myocardial Infarction
Circulation. 2007;116;e148-e304
J. Am. Coll. Cardiol. 2007;50;652-726
2009 Focused Update:
ACCF/AHA Guidelines for the Diagnosis and Management of Heart Failure in Adults
J. Am. Coll. Cardiol. April 14, 2009; 53;1343-1382
Circulation. April 14, 2009;119;1977-2016
Our third speaker of the day was Dr. Sundeep Chaudhry, who is the Chief Medical Officer at MET-TEST. MET- TEST the industry leader in Cardiopulmonary Exercise Testing. This non-invasive stress test uses, uses exercise stress to diagnose abnormalities and disease in your body. A disease or condition that affects the heart, lungs or muscles will limit how much faster and harder these systems can work. A CPET assesses how well the heart, lungs, and muscles are working individually, and how these systems are working in unison. Dr.Chaudry discussed in a professional manner how employers can utilize these systems to not only to diagnose condition but these systems can be used to show improvement of health from year to year. If you are interested in utilizing Cardiopulmonary Exercise Testing our clinic and MET-TEST are happy to come speak with you about the opportunity.
RBG: как часто, куда и зачем ездят украинцыmResearcher
Cреднестатистический украинец совершает примерно 4,1 поездок в месяц, что примерно в 1,5 раза больше, аналогичного показателя среднестатистической украинки (2,7 раза в месяц)
CPR with ECLS vs conventional CPR in IHCASun Yai-Cheng
Cardiopulmonary Resuscitation with Assisted Extracorporeal Life-Support versus Conventional Cardiopulmonary Resuscitation in Adults with In-Hospital Cardiac Arrest
Lancet 2008; 372:554-561
Exercise tolerance testing (also known as exercise testing or exercise stress testing) is used routinely in evaluating patients who present with chest pain, in patients who have chest pain on exertion, and in patients with known ischaemic heart disease.
Post-Cardiac Arrest Syndrome:
Epidemiology, Pathophysiology, Treatment, and Prognostication
A Consensus Statement From the International Liaison Committee on Resuscitation
Circulation. 2008;118:2452-2483
ACC/AHA 2007 Guidelines for UA & NSTEMISun Yai-Cheng
ACC/AHA 2007 Guidelines for the management of Patients with Unstable Angina/Non-ST-Elevation Myocardial Infarction
Circulation. 2007;116;e148-e304
J. Am. Coll. Cardiol. 2007;50;652-726
2009 Focused Update:
ACCF/AHA Guidelines for the Diagnosis and Management of Heart Failure in Adults
J. Am. Coll. Cardiol. April 14, 2009; 53;1343-1382
Circulation. April 14, 2009;119;1977-2016
Our third speaker of the day was Dr. Sundeep Chaudhry, who is the Chief Medical Officer at MET-TEST. MET- TEST the industry leader in Cardiopulmonary Exercise Testing. This non-invasive stress test uses, uses exercise stress to diagnose abnormalities and disease in your body. A disease or condition that affects the heart, lungs or muscles will limit how much faster and harder these systems can work. A CPET assesses how well the heart, lungs, and muscles are working individually, and how these systems are working in unison. Dr.Chaudry discussed in a professional manner how employers can utilize these systems to not only to diagnose condition but these systems can be used to show improvement of health from year to year. If you are interested in utilizing Cardiopulmonary Exercise Testing our clinic and MET-TEST are happy to come speak with you about the opportunity.
RBG: как часто, куда и зачем ездят украинцыmResearcher
Cреднестатистический украинец совершает примерно 4,1 поездок в месяц, что примерно в 1,5 раза больше, аналогичного показателя среднестатистической украинки (2,7 раза в месяц)
Prezi slides from an international marketing masterclass with a seminar on international marketing strategy and how to develop an overseas marketing framework with considerations of the extra complexity that exporting can bring.
,marletin
Dogsee Chew lists out most famous dog quotes. Dogs have given us their absolute all. We are the center of their universe. We are the focus of their love.
https://dogseechew.com/blog/beautiful-dog-quotes/
The QT interval is the time from the start of the Q wave to the end of the T wave.
It represents the time taken for ventricular depolarisation and repolarisation, effectively the period of ventricular systole from ventricular isovolumetric contraction to isovolumetric relaxation.
Case-1: A 23 years old gentleman presented with generalized weakness and fatigue , 2 hours after several bouts of vomiting and diarrhea. His serum potassium was 2.3 mEq/L and he had the following ECG.
Heart Disease & Chest Pain Treatment At NT Cardiovascular Center Georgiamelvillejackson
http://www.ntcardiovascularcenter.com NT Cardiovascular Center providing latest cutting edge and comprehensive technology for heart disease, chest pain treatments, congestive heart failure, coronary artery disease monitoring, or any critical heart condition.
1. LOW-ENERGY DIETS: AN IMPORTANT CAUSE
FOR ACQUIRED LONG QT SYNDROME AND
UNEXPECTED SUDDEN DEATH
DANIEL B. PETROV, MD, FESC &
MARIA H. MILANOVA, MD, PHD
DEPARTMENT OF CARDIOLOGY,
EMERGENCY HOSPITAL “PIROGOV”, SOFIA,
BULGARIA
2. OBJECTIVE:
To determine whether low-energy diets influence
cardiac repolarization, as indicated by
electrocardiographic QT interval.
3. BACKGROUND:
Low-energy diets might lead to QT interval prolongation,
torsade de pointes and sudden death. Examination of weekly
ECGs of 29 patients on very-low caloric intake for weight
loss demonstrated prolongation of the QTc interval in 20
patients during the seventh week at the end of the fast. The
importance of these findings is illustrated by one patient
reported in the Texas Heart Institute Journal (2003), with
QTc lengthening after fasting who sustained cardiac arrest
due to torsade de pointes, successfully resuscitated.
4. METHODS:
The electrocardiogram, QT, RR and QTc [QT/RR(0,5)]
intervals were assessed in 29 healthy obese (BMI>27
kg/m2) subjects on very low caloric diets (800 kcal/d) for 7
weeks. QT, corrected QTc intervals were measured along
with serum albumin and electrolytes at the beginning, once
weekly and at the end of diet therapy. 12-lead ECG had
been obtained from all patients in supine position after 10
min. at rest, in the absence of QT prolongation drugs. The
ECG were recorded at standard gain (10mV/mm) and
speed (25 mm/s).
5. METHODS:
The QT interval was measured from the onset of the
QRS complex to the end of the T wave in all leads,
where the end of the T wave could be clearly defined and
averaged 3 to 5 beats. All the QT interval measurements
were performed with patients in sinus rhythm. QT
intervals were corrected for heart rate using the Bazett
formula. The patients with atrial fibrillation, bundle
branch block and pacemakers were excluded from the
study.
6. RESULTS:
The QTc interval before the start of diet was 0.42+/-
0.025s by manual measurement and 0.41+/-0.022s by
automated measurement. 20 of the patients showed a
QTc interval of greater than 0.43s, and 12 patients
demonstrated moderate QT prolongation (>0.45s) at the
end of the diet.
7. TABLE 1. CORRESPONDING OF QTC WITH ELECTROLYTES AND SERUM
ALBUMIN LEVELS
start and end of diet
QTc
Electrolytes levels
Serum albumin levels
start of diet end of diet
QTc 0.42+/-0.025s
by manual measurement
0.41+/-0.022s
by automated measurement
9 patients with QTc <0.43s
20 patients with QTc >0.43s and 12
of them with QTc >0.45s;
Patients with QTc >0.45s:
- 4 patients with QTc = 0.48s
- 2 patients with QTc = 0.49s
- 2 patients with QTc = 0.51s
- 1 patient with QTc = 0.52s
- 2 patients with QTc = 0.54s
- 1 patient with QTc = 0.55s
Electrolytes levels normal in all patients normal in all patients
Serum albumin levels normal in all patients normal in all patients
8. CONCLUSIONS:
Low-energy diets are associated with prolongation of the QTc interval. They
represent an important cause for acquired long QT syndrome for the following
reasons:
1. There is a risk of potentially lethal ventricular arrhythmias such as torsade
de pointes, which has been suggested to be related to repolarization
abnormalities such as QT interval prolongation.
2. The patients on low-energy diets required close medical supervision with
ECG assessment and given the fact that these subjects are often young and
otherwise healthy, makes their ECG monitoring all the more critical.
3. QT interval prolongation drugs should be avoided in patients on low-energy
diets.